PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019最新文献

筛选
英文 中文
Scattering from artificial plasma cylinder using nonstandard FDTD 利用非标准时域有限差分法对人造等离子体柱体进行散射
Jovia Jose, Sikha K. Simon, Anju Sebastian, Sreedevi P. Chakyar, Joe Kizhakooden, Nees Paul, C. Bindu, K. Umadevi, J. Andrews, V. Joseph
{"title":"Scattering from artificial plasma cylinder using nonstandard FDTD","authors":"Jovia Jose, Sikha K. Simon, Anju Sebastian, Sreedevi P. Chakyar, Joe Kizhakooden, Nees Paul, C. Bindu, K. Umadevi, J. Andrews, V. Joseph","doi":"10.1063/1.5130279","DOIUrl":"https://doi.org/10.1063/1.5130279","url":null,"abstract":"This paper implements Nonstandard Finite Difference Time Domain (NS-FDTD) method to analyses the scattering effect of electromagnetic wave by an artificial plasma cylinder. This NS-FDTD which requires less iteration time for convergence has proved to be around 10,000 times more accurate than the standard FDTD. For a chosen problem, the ratio between wave length and grid space in NS-FDTD need to be only 8 whereas for the standard algorithm it has to be 1140 for the same qualitative result. In this paper, NS-FDTD algorithm which is already successfully implemented for lossless and low loss medium is extended to high loss medium. An artificial negative permittivity metamaterial medium of cylindrical profile is designed using periodic arrangement of thin conducting wires and NS-FDTD is used to study the scattering properties of the plasma structure. For simplicity, interacting field quantities are realized in terms of propagation equation. Converging points of stability function are carefully selected by choosing appropriate value of conductivity. Plane wave of frequency less than the plasma frequency of the artificial plasma cylinder is used for the study. The result obtained is compared with standard FDTD which proves the obvious advantage of using this novel algorithm.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84616883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Sn doping at Sb sites on the structural and optical properties of Co2Sb6 nanostructures Sb位点Sn掺杂对Co2Sb6纳米结构和光学性质的影响
M. U. Kumar, R. Swetha, M. Murugendrappa, L. Kumari
{"title":"Effect of Sn doping at Sb sites on the structural and optical properties of Co2Sb6 nanostructures","authors":"M. U. Kumar, R. Swetha, M. Murugendrappa, L. Kumari","doi":"10.1063/1.5130264","DOIUrl":"https://doi.org/10.1063/1.5130264","url":null,"abstract":"Nanostructured thermoelectric Skutterudite-based compounds Co2Sb6-xSnx (x= 0.15, 0.2, 0.25, 0.3) with different concentration of Sn were synthesized by hydro-/solvothermal method and annealed at 300° C for 5 hrs in inert atmosphere. Surface morphology analysis shows the formation of square block shaped nanostructures with particle size, 50-70 nm and the chemical analysis confirms the purity of the samples. Structural analysis by powder X-ray diffraction (pXRD) depicts cubic structure of CoSb3 and also confirms the successful occupation of Sn into Sb sites without distorting the crystal structure. The vibration modes corresponding to Co-Sb bonding, cobalt complex and Co-Sn bonding can be observed below 1000 cm−1. Sn filled Co2Sb6 nanostructures show absorption bands in the wavelength range of 260-270 nm.Nanostructured thermoelectric Skutterudite-based compounds Co2Sb6-xSnx (x= 0.15, 0.2, 0.25, 0.3) with different concentration of Sn were synthesized by hydro-/solvothermal method and annealed at 300° C for 5 hrs in inert atmosphere. Surface morphology analysis shows the formation of square block shaped nanostructures with particle size, 50-70 nm and the chemical analysis confirms the purity of the samples. Structural analysis by powder X-ray diffraction (pXRD) depicts cubic structure of CoSb3 and also confirms the successful occupation of Sn into Sb sites without distorting the crystal structure. The vibration modes corresponding to Co-Sb bonding, cobalt complex and Co-Sn bonding can be observed below 1000 cm−1. Sn filled Co2Sb6 nanostructures show absorption bands in the wavelength range of 260-270 nm.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82786755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of cerium oxide in reinforcing the properties and densification of yttria ceramics 氧化铈对增强氧化钇陶瓷性能和致密化的影响
Steffy Maria Jose, C. T. Mathew, Sam Solaman, J. K. Thomas
{"title":"Effect of cerium oxide in reinforcing the properties and densification of yttria ceramics","authors":"Steffy Maria Jose, C. T. Mathew, Sam Solaman, J. K. Thomas","doi":"10.1063/1.5130363","DOIUrl":"https://doi.org/10.1063/1.5130363","url":null,"abstract":"Synthesis of high-quality nanostructured Yttria/Ceria (Y2O3/CeO2) nanocomposite and the effect of ceria in reinforcing the properties of yttria are presented in the paper. The ultrafine starting powder is synthesized by a single step modified combustion technique and its green pellet is densified by a microwave sintering technique. The as-synthesized sample is characterized using X-ray diffraction (XRD) for determining the crystalline structure. All the peaks were indexed for a cubic structure of Y2O3 (ICDD: 89-5591) and CeO2 (ICDD: 81-0792). The crystallite size calculated for the highest peak (222) using the Debye-Scherrer equation is 24.05 nm. The crystallite sizes are in the range of 16-25 nm. The structural properties of the combustion product are examined by high-resolution transmission electron microscopy (HRTEM). Phase purity is ascertained by FTIR spectroscopy. The optical transmittance is examined by UV-Visible spectroscopy. The sample shows a band gap of 3.42 eV and a high refractive index of 2.36. The theoretical transmittance in the UV-Visible range is 71.8%. The nanopowder is compacted to pellets by hydraulic pressing and densified to 99.5 % of theoretical density at 1450 0C with a ramp rate of 200C/min for a soaking duration of 30 min which is better compared to pure yttria. The morphological investigations are done using field emission scanning electron microscopy (FESEM). The properties show that the sample can be effectively used to fabricate infrared transparent ceramic material.Synthesis of high-quality nanostructured Yttria/Ceria (Y2O3/CeO2) nanocomposite and the effect of ceria in reinforcing the properties of yttria are presented in the paper. The ultrafine starting powder is synthesized by a single step modified combustion technique and its green pellet is densified by a microwave sintering technique. The as-synthesized sample is characterized using X-ray diffraction (XRD) for determining the crystalline structure. All the peaks were indexed for a cubic structure of Y2O3 (ICDD: 89-5591) and CeO2 (ICDD: 81-0792). The crystallite size calculated for the highest peak (222) using the Debye-Scherrer equation is 24.05 nm. The crystallite sizes are in the range of 16-25 nm. The structural properties of the combustion product are examined by high-resolution transmission electron microscopy (HRTEM). Phase purity is ascertained by FTIR spectroscopy. The optical transmittance is examined by UV-Visible spectroscopy. The sample shows a band gap of 3.42 eV and a high refractive index of 2...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90956713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation on the size dependent optical and magnetic properties of DNA assisted synthesized nanoceria for next generation spintronic devices 新一代自旋电子器件中DNA辅助合成纳米粒子的光学和磁性研究
P. Jyothi, B. Anitha, N. Tharayil
{"title":"Investigation on the size dependent optical and magnetic properties of DNA assisted synthesized nanoceria for next generation spintronic devices","authors":"P. Jyothi, B. Anitha, N. Tharayil","doi":"10.1063/1.5130335","DOIUrl":"https://doi.org/10.1063/1.5130335","url":null,"abstract":"Cerium oxide nanoparticles or nanoceria of average crystallite size ∼ 6, 9 and 14 nm were synthesized by chemical co-precipitation method using deoxyribonucleic acid (DNA) as capping agent. Size dependent structural, optical and magnetic properties of prepared samples were investigated by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), UV-Visible diffuse reflectance spectroscopy and vibrating sample magnetometer (VSM) measurements. The increase in the value of optical band gap with decrease in particle size may be attributed to the quantum confinement effect. The saturation magnetization, coercivity and remanence increases as the particle size decreases from 14 nm to 9 nm. This is in view of the fact that increase in oxygen vacancies may produce magnetic moment by polarizing spins of f electrons of cerium ions located around them. The magnetic properties decreases below a critical size, since thermal energy can overcome the anisotropy and spontaneously reverse the magnetization of a particle from one easy direction to the other. The semiconducting properties along with room temperature ferromagnetism make DNA assisted synthesized nanoceria suitable for fabrication of next generation spintronic devices.Cerium oxide nanoparticles or nanoceria of average crystallite size ∼ 6, 9 and 14 nm were synthesized by chemical co-precipitation method using deoxyribonucleic acid (DNA) as capping agent. Size dependent structural, optical and magnetic properties of prepared samples were investigated by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), UV-Visible diffuse reflectance spectroscopy and vibrating sample magnetometer (VSM) measurements. The increase in the value of optical band gap with decrease in particle size may be attributed to the quantum confinement effect. The saturation magnetization, coercivity and remanence increases as the particle size decreases from 14 nm to 9 nm. This is in view of the fact that increase in oxygen vacancies may produce magnetic moment by polarizing spins of f electrons of cerium ions located around them. The magnetic properties decreases below a critical size, since thermal energy can overcome the anisotropy and spontaneously reverse the magnet...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"136 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75137388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Monte Carlo simulation of grain growth in polycrystalline material using Potts Q-state model-a perspective 基于Potts q态模型的多晶材料晶粒生长蒙特卡罗模拟研究
P. Rajendra, K. Phaneesh
{"title":"The Monte Carlo simulation of grain growth in polycrystalline material using Potts Q-state model-a perspective","authors":"P. Rajendra, K. Phaneesh","doi":"10.1063/1.5130215","DOIUrl":"https://doi.org/10.1063/1.5130215","url":null,"abstract":"The Monte Carlo simulation method is now widely applied to materials science and engineering to the study of the kinetics of grain growth in two dimensions. This review Survey includes the grain growth kinetics, Grain Size and Grain Distribution by Monte Carlo simulation method. The initial distribution of orientations is chosen at random and the system evolves so as to reduce the number of nearest neighbor pairs of unlike crystallographic orientation. The temporal evolution of the microstructure is monitored to yield the time dependence of the size and shapes of the grains. A procedure incorporating the Metropolis algorithm which helps in developing the code for computer simulation is given as examples, two codes written using MATLAB software to simulate microstructure evolution using 2D ISING and POTTS Q-States Model would be demonstrated.The Monte Carlo simulation method is now widely applied to materials science and engineering to the study of the kinetics of grain growth in two dimensions. This review Survey includes the grain growth kinetics, Grain Size and Grain Distribution by Monte Carlo simulation method. The initial distribution of orientations is chosen at random and the system evolves so as to reduce the number of nearest neighbor pairs of unlike crystallographic orientation. The temporal evolution of the microstructure is monitored to yield the time dependence of the size and shapes of the grains. A procedure incorporating the Metropolis algorithm which helps in developing the code for computer simulation is given as examples, two codes written using MATLAB software to simulate microstructure evolution using 2D ISING and POTTS Q-States Model would be demonstrated.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91249195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel voltammetric sensor for morphine detection based on electrochemically synthesized poly (p-aminobenzenesulfonicacid)/reduced graphene oxide composite 基于电化学合成聚对氨基苯磺酸/还原氧化石墨烯复合材料的新型吗啡检测伏安传感器
Pinky Abraham, S. Renjini, T. Mary, V. Kumary, P. Chithra
{"title":"A novel voltammetric sensor for morphine detection based on electrochemically synthesized poly (p-aminobenzenesulfonicacid)/reduced graphene oxide composite","authors":"Pinky Abraham, S. Renjini, T. Mary, V. Kumary, P. Chithra","doi":"10.1063/1.5130268","DOIUrl":"https://doi.org/10.1063/1.5130268","url":null,"abstract":"In this work a novel and sensitive sensor for morphine (MO) based on electrochemically synthesized poly(p-aminobenzenesulfonicacid)/reduced grapheneoxide (poly(p-ABSA)/RGO) composite modified glassy carbon electrode was reported. The prepared composite was systematically characterized by various techniques like FT-IR, FESEM and EDX. The electrochemical response of morphine on this sensor was investigated in physiological pH 7.0 phosphate buffer solution by cyclic voltammetry and differential pulse voltammetry. The fabricated sensor provides a linear response in the range of 50 nM-80 µM with a detection limit of 47 nM for MO. In addition the sensor also provides good stability, repeatability and anti interference property.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85586383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis and structural characterization of BiSbTe3 topological insulator single crystal bbte3拓扑绝缘体单晶的合成及结构表征
Indu Rajput, A. Lakhani
{"title":"Synthesis and structural characterization of BiSbTe3 topological insulator single crystal","authors":"Indu Rajput, A. Lakhani","doi":"10.1063/1.5130254","DOIUrl":"https://doi.org/10.1063/1.5130254","url":null,"abstract":"We report the synthesis and structural characterization of the topological insulator BiSbTe3 single crystal. In Bi2Te3, the Fermi level (EF) lies in the bulk conduction band due to electron type bulk carriers induced by Te vacancies. While in Sb2Te3, Fermi level lies in the bulk valance band due to hole type bulk carriers induced by Sb-Te antisite defects. It is difficult to observe the topological properties by transport experiments due to excess contribution from bulk states. By mixing these two compounds, the ratio of bismuth (Bi) to antimony (Sb) can shift the Fermi level (EF) from bulk conduction band to bulk valance band providing an opportunity to realize ideal topological insulator with insulating bulk. In (Bi1-xSbx)2Te3, at Bi:Sb ratio of 1:1, the Fermi level lies in the bulk gap which is ideal for probing topological surface states through transport measurements. We have grown good quality single crystals of BiSbTe3 using modified Bridgman method. The X-ray diffraction analysis, Scanning electron microscopy and Energy dispersive electron spectroscopy confirms the single crystal formation, phase purity and stoichiometric atomic ratio of the prepared crystal. The electrical resistivity measurement of the crystal shows the metallic nature and high quality of the grown crystal.We report the synthesis and structural characterization of the topological insulator BiSbTe3 single crystal. In Bi2Te3, the Fermi level (EF) lies in the bulk conduction band due to electron type bulk carriers induced by Te vacancies. While in Sb2Te3, Fermi level lies in the bulk valance band due to hole type bulk carriers induced by Sb-Te antisite defects. It is difficult to observe the topological properties by transport experiments due to excess contribution from bulk states. By mixing these two compounds, the ratio of bismuth (Bi) to antimony (Sb) can shift the Fermi level (EF) from bulk conduction band to bulk valance band providing an opportunity to realize ideal topological insulator with insulating bulk. In (Bi1-xSbx)2Te3, at Bi:Sb ratio of 1:1, the Fermi level lies in the bulk gap which is ideal for probing topological surface states through transport measurements. We have grown good quality single crystals of BiSbTe3 using modified Bridgman method. The X-ray diffraction analysis, Scanning electro...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81831820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A review on computational modelling of individual device components and interfaces of perovskite solar cells using DFT 钙钛矿太阳能电池各器件组件和界面的DFT计算模型研究进展
Deepthi Jayan, V. Sebastian
{"title":"A review on computational modelling of individual device components and interfaces of perovskite solar cells using DFT","authors":"Deepthi Jayan, V. Sebastian","doi":"10.1063/1.5130246","DOIUrl":"https://doi.org/10.1063/1.5130246","url":null,"abstract":"Perovskite structures with the same crystal structure as CaTiO3, are of importance in the field of Materials Science right from the discovery of ceramic high-temperature superconductors to the organic–inorganic semiconductors for high-efficiency photovoltaics. Owing to their unique crystal structure, perovskites display a variety of interesting properties like ferroelectricity, superconductivity, magnetoresistance, birefringence, piezoelectricity etc. Moreover, the efficiency of perovskite solar cells has increased from 3.1% in 2009 to 22.1% in 2017. Since a large number of elements can be combined to form perovskite structures, one can selectively design and optimize perovskite’s physical, optical and electrical characteristics. Through theoretical and computational modelling, it is possible to access the hitherto unknown atomistic properties, opto-electronic properties and operational mechanisms of these materials with high accuracy. This paper aims at explaining some of the potentialities of DFT hybrid functionals to analyze the electronic, structural and optical properties of compounds constituting various layers of a perovskite solar cell with the help of software packages like VASP, Wien 2k. Gaussian 09 etc. This paper also reviews the effect of doping on the electronic properties of various layers of perovskite solar cells including the band gap, visible light absorption, relaxation time of holes and electrons using DFT, which in turn determines the optimum charge separation. The effect of introduction of an Intermediate Band Gap in the perovskite structure using DFT methods based on G0W0+SOC approach is also discussed here. A study on the effect of various intrinsic defects present in perovskite structures using DFT calculations with VASP package is also discussed. The relevance of modelling the interfaces of various layers of perovskite solar cells with DFT packages is discussed with the help of selected examples of materials and representative interfaces.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80373634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Study of dielectric and magnetodielectric properties of Y-type Ba2Mg1.5Ni0.5Fe12O22 hexaferrite y型Ba2Mg1.5Ni0.5Fe12O22六铁氧体介电和磁介电性能研究
Md. F. Abdullah, P. Pal, S. Patel, K. Chandrakanta, R. Jena, A. Singh
{"title":"Study of dielectric and magnetodielectric properties of Y-type Ba2Mg1.5Ni0.5Fe12O22 hexaferrite","authors":"Md. F. Abdullah, P. Pal, S. Patel, K. Chandrakanta, R. Jena, A. Singh","doi":"10.1063/1.5130368","DOIUrl":"https://doi.org/10.1063/1.5130368","url":null,"abstract":"We have investigated dielectric and magnetodielectric (MD) properties of polycrystalline Y-type hexaferrite Ba2Mg1.5Ni0.5Fe12O22 (BMNF). Rietveld refinement of the X-ray diffraction pattern and hexagonal plate-like Field Emission Scanning Electron Microscope (FESEM) micrograph confirms the phase purity with the rhombohedral crystal structure (R-3m space group). Both temperatures dependent dielectric permittivity (e׳) and dielectric loss (tan δ) show an anomaly around 150°C and 290°C. The comparable value of activation energy extracted from impedance spectroscopy above 290°C between σg and σgb indicates that relaxation and conduction mechanism may be attributing to the same entities. Room temperature magnetodielectric (MD) measurement at 1MHz indicates the step like increase at ∼8 kOe in dielectric constant (e) with applied field but a reverse trend is observed for magneto-loss (ML) with step like feature preserving it nature.We have investigated dielectric and magnetodielectric (MD) properties of polycrystalline Y-type hexaferrite Ba2Mg1.5Ni0.5Fe12O22 (BMNF). Rietveld refinement of the X-ray diffraction pattern and hexagonal plate-like Field Emission Scanning Electron Microscope (FESEM) micrograph confirms the phase purity with the rhombohedral crystal structure (R-3m space group). Both temperatures dependent dielectric permittivity (e׳) and dielectric loss (tan δ) show an anomaly around 150°C and 290°C. The comparable value of activation energy extracted from impedance spectroscopy above 290°C between σg and σgb indicates that relaxation and conduction mechanism may be attributing to the same entities. Room temperature magnetodielectric (MD) measurement at 1MHz indicates the step like increase at ∼8 kOe in dielectric constant (e) with applied field but a reverse trend is observed for magneto-loss (ML) with step like feature preserving it nature.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82148786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation and characterization of silver antimony selenide thin film 硒化锑银薄膜的制备与表征
A. Kuruvilla, Melda Francis, M. Lakshmi
{"title":"Preparation and characterization of silver antimony selenide thin film","authors":"A. Kuruvilla, Melda Francis, M. Lakshmi","doi":"10.1063/1.5130290","DOIUrl":"https://doi.org/10.1063/1.5130290","url":null,"abstract":"I-V-VI2 class of chalcopyrite acts as good absorbers for photovoltaic applications with its strong absorption in the visible region of solar spectra. AgSbSe2 is such a semiconducting material that can be used for photovoltaic applications. In the present work AgSbSe2 was prepared by annealing two different stacked layer structures glass/Sb2S3/Se/Ag and glass/Sb2Se3/Se/Ag at temperatures around 300°C. Deposition of Sb2S3, Sb2Se3 and Se films were carried out by the method of Chemical bath deposition. Ag layer was deposited using RF sputtering. Structural, morphological, chemical and optical characterization of the samples was done using XRD, SEM, EDAX and optical absorption studies respectively.I-V-VI2 class of chalcopyrite acts as good absorbers for photovoltaic applications with its strong absorption in the visible region of solar spectra. AgSbSe2 is such a semiconducting material that can be used for photovoltaic applications. In the present work AgSbSe2 was prepared by annealing two different stacked layer structures glass/Sb2S3/Se/Ag and glass/Sb2Se3/Se/Ag at temperatures around 300°C. Deposition of Sb2S3, Sb2Se3 and Se films were carried out by the method of Chemical bath deposition. Ag layer was deposited using RF sputtering. Structural, morphological, chemical and optical characterization of the samples was done using XRD, SEM, EDAX and optical absorption studies respectively.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82626807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信