Physics of the Solid State最新文献_第5页

Influence of Calcium Doping on the Physical, Microstructural, and Electrical Characteristics of Sr1–xCaxTiO3 Ceramics 钙掺杂对Sr1-xCaxTiO3陶瓷物理、微观结构和电学特性的影响

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-07-02 DOI: 10.1134/S1063783425600220

Jakkula Shankar, Paramesh Donta, Raju Panthagani

{"title":"Influence of Calcium Doping on the Physical, Microstructural, and Electrical Characteristics of Sr1–xCaxTiO3 Ceramics","authors":"Jakkula Shankar, Paramesh Donta, Raju Panthagani","doi":"10.1134/S1063783425600220","DOIUrl":"10.1134/S1063783425600220","url":null,"abstract":"The strontium calcium titanate (Sr1–xCaxTiO3) ceramics have been synthesized using the solid-state reaction method. Sr1–xCaxTiO3 ceramics are sintered at 1300°C for 3 h. The X-ray diffraction confirmed perovskite tetragonal strontium calcium titanate ceramics. It is found that with the increase of calcium content in Sr1–xCaxTiO3 the unit cell volume and density decrease. The microstructure of strontium calcium titanate is examined using field emission scanning electron microscopy it is found that with the addition of calcium, the average grain size has increased for all compositions of Sr1–xCaxTiO3 ceramics. Porosity is decreased with the addition of calcium in Sr1–xCaxTiO3 ceramics. The variation of relative permittivity (ɛr) and loss tangent (tanδ) with temperature in Sr1–xCaxTiO3 ceramics was observed to remain constant up to 200°C and beyond this temperature ɛr and tan δ enhanced with a rise in Calcium content.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 7","pages":"533 - 539"},"PeriodicalIF":1.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Electrical Properties of LiMn2O4 and LiMn1.94Gd0.03Fe0.03O4 Nano Ceramics for Battery Applications 电池用LiMn2O4和limn1.94 gd0.03 fe0.030 o4纳米陶瓷的电学性能研究

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-07-02 DOI: 10.1134/S1063783425600360

N. Suresh Kumar, M. Sumithra, C. Thirmal, S. D. Ramarao

{"title":"Investigation of Electrical Properties of LiMn2O4 and LiMn1.94Gd0.03Fe0.03O4 Nano Ceramics for Battery Applications","authors":"N. Suresh Kumar, M. Sumithra, C. Thirmal, S. D. Ramarao","doi":"10.1134/S1063783425600360","DOIUrl":"10.1134/S1063783425600360","url":null,"abstract":"LiMn2O4 is well established material used in Li-ion batteries as cathode. To widen the application capability, it is important to tune its electrical properties using various approaches such as doping with suitable elements. The present study explores the fabrication of LiMn2O4 and LiMn1.94Gd0.03Fe0.03O4 nano powders along with their ceramic pellets. The X-ray diffraction was employed to study the crystalline purity and scanning electron micrograph is utilized to study the size and shape of the nanoparticles. The real and imaginary parts of the impedance from 102 to 106 Hz. The equivalent circuit is simulated to understand the microscopic origins to the measured impedance. Finally, the ac conductivity was calculated from impedance data and analyzed using power law of conductivity. The universal exponent (s-parameter) was obtained from the linear fit curve of the frequency dependent conductivity. Hence, these samples may bring new developments in the fields of cathode materials for Li-ion materials.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 7","pages":"606 - 610"},"PeriodicalIF":1.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and Optical Characterization of Gd Doped NiO Thin Films Deposited by Spin Coating Technique 自旋镀膜技术沉积Gd掺杂NiO薄膜的结构和光学特性

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-07-02 DOI: 10.1134/S1063783425600311

N. V. Srinivasa, Basavaraj Angadi, H. M. Mahesh

{"title":"Structural and Optical Characterization of Gd Doped NiO Thin Films Deposited by Spin Coating Technique","authors":"N. V. Srinivasa, Basavaraj Angadi, H. M. Mahesh","doi":"10.1134/S1063783425600311","DOIUrl":"10.1134/S1063783425600311","url":null,"abstract":"The NiO films exhibit excellent optical and electrical properties due to their wide bandgap and p‑type semiconducting behaviour, making them suitable for optoelectronic and TCOs. Furthermore, the intrinsic properties of NiO are enhanced by doping with suitable elements. Pristine and Gd-doped NiO (Ni1–xGdxO; x = 0, 0.02, 0.04, and 0.06) films. The various doping concentrations are deposited using the spin deposition technique. The detailed effects of Gadolinium (Gd) doping in a NiO matrix are investigated using structural, optical, and photoluminescence analysis. The XRD results show the average crystallite size varying from 14 to 8.7 nm for pure and Gd-doped NiO films with a face-centred cubic polycrystalline nature. The Raman spectroscopy analysis confirms the quality (purity) of the prepared thin films, showing Ni–O first-order modes that shift to higher wave numbers with Gd doping. FTIR analysis exhibits Ni–O-related vibrational bands in the range of 555 to 735 cm–1 and other vibrational bands linked to various functional groups. The UV-visible spectra reveal the highest average transmittance of around 90% for films with Gd doping up to 4%. The energy gap evaluated utilizing Tauc’s plot analysis, varies from 3.52 to 3.56 eV for pure and doped films. From the PL spectra, near band edge emission peaks (363 nm) and other structural defects-related emission peaks are observed. The results suggest that by varying the dopant concentration, the structural and optical parameters can be modified. These films have the potential to be used in optoelectronic and catalytic devices.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 7","pages":"598 - 605"},"PeriodicalIF":1.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical Bandgap Tuning of Manganese Ferrite by Nickel Doping and Heat Treatment 镍掺杂及热处理对铁氧体锰光学带隙调谐的影响

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-07-02 DOI: 10.1134/S1063783425600438

Anum Mohammedi, V. M. Jali

{"title":"Optical Bandgap Tuning of Manganese Ferrite by Nickel Doping and Heat Treatment","authors":"Anum Mohammedi, V. M. Jali","doi":"10.1134/S1063783425600438","DOIUrl":"10.1134/S1063783425600438","url":null,"abstract":"Controlled doping is the paradigmatic approach for improving the properties of any pristine material. NixMn1–xFe2O4 (x = 0, 0.01, 0.03, 0.05, 1) were synthesized by the facile sol–gel auto combustion method. The as-prepared samples were further annealed. Formation of impurity levels, structural, morphological, vibrational, optical and electronic variations as a result of Nickel doping is systematically analyzed by structural and optical studies. The average crystallite size shows decremental trend for pre annealed and an incremental trend for annealed samples. Increased particle agglomeration can be seen in SEM micrographs. EDAX confirms the compositional variation of Nickel from 1 to 5%. FTIR and Raman spectra represent band shifting towards higher wavenumber and Raman peak broadening with Nickel substitution. Optical analyses suggests that MnFe2O4 which has optical bandgap of ~2.2 eV is reduced to ~1.7 eV (pre annealed) and ~1.4 eV (annealed) and thus can be made as a photo catalyst material. Photoluminescence spectra of pre- and post-annealed samples show presence of peak in visible region with a red shift in PL spectra indicating band narrowing.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 7","pages":"582 - 591"},"PeriodicalIF":1.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Microwave-Irradiated Fe2O3 with Activated Charcoal for Superior Electrochemical Performance 微波辐照Fe2O3活性炭的电化学性能研究

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-07-02 DOI: 10.1134/S1063783425600256

R. Manigandan, P. Thirupura Sundari, S. Aravindhan, S. Srinivasan, A. P. Lingaswamy

{"title":"Study of Microwave-Irradiated Fe2O3 with Activated Charcoal for Superior Electrochemical Performance","authors":"R. Manigandan, P. Thirupura Sundari, S. Aravindhan, S. Srinivasan, A. P. Lingaswamy","doi":"10.1134/S1063783425600256","DOIUrl":"10.1134/S1063783425600256","url":null,"abstract":"This study presents the synthesis and modification of Fe2O3 nanoparticles using a simple co-precipitation method, followed by microwave irradiation and incorporation with activated charcoal to enhance their structural, optical, and electrochemical properties. X-ray diffraction (XRD) analysis confirmed the rhombohedral phase of hematite (α-Fe2O3) and revealed enhanced lattice strain upon microwave irradiation improving active site density. UV-Vis spectroscopy showed a significant bandgap reduction from 2.5 eV (pure Fe2O3) to 1.6 eV (microwave-irradiated Fe2O3 with activated charcoal) indicating superior light absorption. Electrochemical characterization demonstrated improved redox activity and specific capacitance, with microwave-irradiated Fe2O3 with activated charcoal achieving the highest performance due to enhanced conductivity and porosity. These results highlight the synergistic effects of microwave irradiation and activated charcoal making the modified Fe2O3 a promising candidate for applications in catalysis, energy storage, and optoelectronics.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 7","pages":"540 - 547"},"PeriodicalIF":1.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Electrical, and Microstructural Properties of Barium Strontium Titanate Ceramics 钛酸钡锶陶瓷的结构、电学和微观结构特性

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-07-02 DOI: 10.1134/S1063783425600232

M. Srinivasa Reddy, A. Shiva Kumar

{"title":"Structural, Electrical, and Microstructural Properties of Barium Strontium Titanate Ceramics","authors":"M. Srinivasa Reddy, A. Shiva Kumar","doi":"10.1134/S1063783425600232","DOIUrl":"10.1134/S1063783425600232","url":null,"abstract":"The barium strontium titanate (Ba1–xSrxTiO3) ceramics have been synthesized using the solid-state reaction method. Ba1–xSrxTiO3 ceramics are sintered at 1000°C for 3 h. The X-ray diffraction confirmed perovskite tetragonal barium strontium titanate ceramics. It is found that with the increase of strontium content in Ba1–xSrxTiO3 the unit cell parameters, dielectric loss decreased. The microstructure of barium strontium titanate is examined using field emission scanning electron microscopy it is found that with the addition of strontium, the average grain size has decreased for all compositions of Ba1–xSrxTiO3 ceramics. Curie temperature is decreased with the addition of strontium in Ba1–xSrxTiO3 ceramics. The variation of relative permittivity (ɛr) and loss tangent (tanδ) with temperature of Ba1–xSrxTiO3 ceramics was studied.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 7","pages":"619 - 623"},"PeriodicalIF":1.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the Efficiency of In0.62Ga0.38N Solar Cells Using an InN Back Surface Field Layer: A Numerical Simulation Approach 利用InN后表面场层提高In0.62Ga0.38N太阳能电池效率的数值模拟方法

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-06-18 DOI: 10.1134/S1063783425600396

Amine Hadjouni, Arslane Hatem Kacha, Zineb Benamara, Boudali Akkal

{"title":"Enhancing the Efficiency of In0.62Ga0.38N Solar Cells Using an InN Back Surface Field Layer: A Numerical Simulation Approach","authors":"Amine Hadjouni, Arslane Hatem Kacha, Zineb Benamara, Boudali Akkal","doi":"10.1134/S1063783425600396","DOIUrl":"10.1134/S1063783425600396","url":null,"abstract":"Indium gallium nitride (InGaN) solar cells have emerged as promising candidates in photovoltaic research due to their tunable direct bandgap, strong light absorption, and favorable electronic characteristics. This study presents a numerical analysis of a p-InGaN/n-InGaN solar cell configuration, both with and without an added back surface field (BSF) layer, using the SILVACO-ATLAS 2D device simulation tool. The basic solar cell structure without a BSF layer (Al//p-InGaN/n-InGaN/Ag) serves as a reference, while a highly doped indium nitride (InN) BSF layer at the rear contact interface contact in the enhanced version. The study explores how variations in the BSF layer, in addition to the thickness and doping levels of the buffer and absorber layers, influence on key performance metrics such as open-circuit voltage (VOC), short-circuit current density (JSC), fill factor (FF), power conversion efficiency (PCE), and quantum efficiency (QE). Findings reveal that the introduction of the InN BSF layer improves the PCE from 23.52 to 24.43%, with a corresponding rise in JSC from 36.91 to 38.05 mA/cm2, and VOC from 0.817 to 0.821 V. Furthermore, the quantum efficiency exceeds 78.32% over the 300–900 nm wavelength range. This work provides a comprehensive optimization approach and demonstrates that using an InN BSF layer can significantly enhance the efficiency of InGaN solar cells by mitigating recombination and improving carrier collection. The findings offer a pathway toward higher-efficiency InGaN-based solar cells, making this approach a promising candidate for future photovoltaic technologies in both terrestrial and space applications.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 6","pages":"443 - 454"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and Photoluminescence Properties of White Emitting Phosphor Based on (Ce0.98Dy0.02)MgAl11O19 Magnetoplumbite Structure 基于（Ce0.98Dy0.02）MgAl11O19磁铅矿结构的白色发光荧光粉的结构和光致发光性能

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-06-18 DOI: 10.1134/S1063783425601201

Sevda Erdoğan, Fatih Mehmet Emen, Ramazan Altınkaya, Esra Kalem, Göktürk Avşar, Nevzat Külcü

{"title":"Structural and Photoluminescence Properties of White Emitting Phosphor Based on (Ce0.98Dy0.02)MgAl11O19 Magnetoplumbite Structure","authors":"Sevda Erdoğan, Fatih Mehmet Emen, Ramazan Altınkaya, Esra Kalem, Göktürk Avşar, Nevzat Külcü","doi":"10.1134/S1063783425601201","DOIUrl":"10.1134/S1063783425601201","url":null,"abstract":"A series of white emitting phosphors based Ce1–xDyxMgAl11O19 (x = 0.01–0.05) were synthesized by solid state chemistry. The systematic studies of the luminescent properties of these phosphors were performed. It is established that the (Ce0.92Dy0.02)MgAl11O19 (CMAD) is crystallizes in hexagonal crystal sys-tem with P63/mmc (194) space group and its unit cell parameters are a = 5.4037 Å, b = 5.4037 Å, c = 21.9296 Å; α = 90.00°, β = 90.00°, γ = 120.00°; Z = 2; V = 587.41 (Å)3. SEM technique was used elucidate the surface morphology and particle sizes of CMAD. The excitation spectra reveal that the UV-Vis light efficiently excite Ce1–xDyxMgAl11O19 in the range 220–400 nm. The emission spectrum of (Ce0.98Dy0.02)MgAl11O19 shows two strong peaks at 474 and 570 nm as well as weak bands at 657, 696, and 750 nm. The luminescence decay time (τ) was calculated and found 1.22 ms.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 6","pages":"478 - 484"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Mechanical, and Electronic Properties of the Compounds Sc2B and ScB under Pressure 化合物Sc2B和ScB在压力下的结构、力学和电子性能

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-06-18 DOI: 10.1134/S1063783425601110

Binhua Chu, Mengyao Wang, Wenke Xu, Xuan Li

引用次数: 0

Impact of Ce3+ and Y3+ Rare Earth Additions on Structural, Optical, Morphological, and Magnetic Properties of Mn–Zn Spinel Nanoferrites Ce3+和Y3+稀土添加对Mn-Zn尖晶石纳米铁素体结构、光学、形貌和磁性能的影响

IF 1.8 4区物理与天体物理

Physics of the Solid State Pub Date : 2025-06-18 DOI: 10.1134/S1063783425600517

Bhaurao R. Balbudhe, Dilip S. Badwaik, Shrikant M. Suryawanshi, Sarang R. Daf, Atul N. Yerpude

{"title":"Impact of Ce3+ and Y3+ Rare Earth Additions on Structural, Optical, Morphological, and Magnetic Properties of Mn–Zn Spinel Nanoferrites","authors":"Bhaurao R. Balbudhe, Dilip S. Badwaik, Shrikant M. Suryawanshi, Sarang R. Daf, Atul N. Yerpude","doi":"10.1134/S1063783425600517","DOIUrl":"10.1134/S1063783425600517","url":null,"abstract":"Two series of Mn0.5Zn0.5Fe2–xO4Rx (where R = Ce, Y, and x = 0.00 to 0.15) spinel nanoferrites were synthesized via a co-precipitation approach. Methods including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM), and scanning electron microscopy (SEM) were utilized to examine the samples’ structural, morphological, optical, and magnetic features. XRD confirmed a cubic spinel structure, with crystalline sizes lies between 16 and 24 nm for Ce3+ added and 15 and 19 nm for Y3+ added ferrite NPs. XRD analysis showed that Ce3+ and Y3+ ions were successfully incorporated into the Mn–Zn spinel structure. FTIR spectra validated the presence of tetrahedral (A) and octahedral (B) sites in all compositions of Mn0.5Zn0.5Fe2–xO4Rx nanoparticles, indicative of spinel ferrites exhibiting a face-centered cubic (FCC) structure. SEM studies revealed agglomerated nanoparticles with spherical morphology. Energy dispersive X-ray spectroscopy (EDS) verified that all elements are present in the composition. The TEM micrograph shows the existence of slightly agglomerated nanoparticles. Magnetic properties, including saturation magnetization and coercivity, were analyzed using M–H hysteresis curves, showing dependence on rare earth substitution and A–B exchange interactions. The lower value of coercivity (Hc) indicatied of soft nature of NPs. The multidomain nature of the nanoferrites indicates their potential for electronics applications.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"67 6","pages":"485 - 498"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0