Physica B-condensed Matter最新文献_第9页

Investigation of the physical properties through strain effect of monolayer silicon carbide material: DFT analysis 通过应变效应研究单层碳化硅材料的物理性质：DFT 分析

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-29 DOI: 10.1016/j.physb.2024.416670

Md. Mahfuzul Haque , Md. Rasidul Islam , Sajid Muhaimin Choudhury

引用次数: 0

RT and temperature-dependent dielectric behaviour of NiAl2O4-Effect of calcination temperature NiAl2O4的RT和随温度变化的介电性能--煅烧温度的影响

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-29 DOI: 10.1016/j.physb.2024.416677

Katrapally Vijaya Kumar , Rajesh Siripuram , Sara Durga Bhavani , Madireddy Buchi Suresh

{"title":"RT and temperature-dependent dielectric behaviour of NiAl2O4-Effect of calcination temperature","authors":"Katrapally Vijaya Kumar , Rajesh Siripuram , Sara Durga Bhavani , Madireddy Buchi Suresh","doi":"10.1016/j.physb.2024.416677","DOIUrl":"10.1016/j.physb.2024.416677","url":null,"abstract":"<div><div>Sol gel auto-combustion was used to create nickel aluminate nanoparticles having the chemical composition NiAl2O4, which were then calcined at 700, 900, 1100, and 1300 °C for the present study. In order to evaluate the phase purity and validate the spinel structure and Fd3m space group of the prepared sample, the X-ray diffractometry result was examined at room temperature using the Rietveld refinement method. The LCR meter has been used to study dielectric properties such as the dielectric constant, tangent loss, and A.C. conductivity. The dielectric parameter, impedance, and A.C. conductivity changes were investigated as a function of temperature and frequency wherein temperature in the range 200–800 °C, and frequency in the range 1 Hz–10 MHz. The value of the dielectric constant was observed in the range 1.5⨯103–7.25⨯108 at room temperature and 2.8⨯107–1.6⨯109 at temperature span of 200 °C–800 °C. It has been found that the dielectric loss of produced aluminates decreased with the calcination temperature, hence, the sample calcined at 1300 °C would be a good choice for low loss applications. The semicircle character of the Cole-cole plots was exhibited by all the samples at room temperature and in the temperature range 200–800 °C. It has been found that the dielectric properties decrease with increasing frequency and temperature between 200 and 800 °C and Maxwell-Wagner interfacial polarization strongly supported these results.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416677"},"PeriodicalIF":2.8,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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Effect of restricted geometry on phase transitions in nanostructured sodium nitrate 限制几何形状对纳米结构硝酸钠相变的影响

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-29 DOI: 10.1016/j.physb.2024.416676

Olga A. Alekseeva, Aleksandr A. Naberezhnov, Aleksandr V. Fokin

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Magnetic ordering exploration by study of the magnetostriction 通过研究磁致伸缩探索磁有序性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-29 DOI: 10.1016/j.physb.2024.416659

Hank Steve Andia Prado , Nicolae Cretu , Adam Lörinczi , Petre Badica , Iurii Bogomol

引用次数: 0

Identification of the high-pressure phases of α-SnWO4 combining x-ray diffraction and crystal structure prediction 结合 X 射线衍射和晶体结构预测鉴定 α-SnWO4 的高压相

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-28 DOI: 10.1016/j.physb.2024.416666

Daniel Diaz-Anichtchenko , Jordi Ibáñez , Pablo Botella , Robert Oliva , Alexei Kuzmin , Li Wang , Yuwei Li , Alfonso Muñoz , Frederico Alabarse , Daniel Errandonea

{"title":"Identification of the high-pressure phases of α-SnWO4 combining x-ray diffraction and crystal structure prediction","authors":"Daniel Diaz-Anichtchenko , Jordi Ibáñez , Pablo Botella , Robert Oliva , Alexei Kuzmin , Li Wang , Yuwei Li , Alfonso Muñoz , Frederico Alabarse , Daniel Errandonea","doi":"10.1016/j.physb.2024.416666","DOIUrl":"10.1016/j.physb.2024.416666","url":null,"abstract":"<div><div>We have characterized the high-pressure behavior of <math><mrow><mi>α</mi></mrow></math>-SnWO4. The compound has been studied up to 30 GPa using a diamond-anvil cell and synchrotron powder X-ray diffraction. We report evidence of two structural phase transitions in the pressure range covered in our study, and we propose a crystal structure for the two high-pressure phases. The first one, observed around 12.9 GPa, has been obtained combining indexation using DICVOL and density-functional theory calculations. The second high-pressure phase, observed around 17.5 GPa, has been determined by using the CALYPSO code, the prediction of which was supported by a Le Bail fit to the experimental X-ray diffraction patterns. The proposed structural sequence involves two successive collapses of the unit-cell volume and an increase in the coordination number of Sn and W atoms. The room-temperature equations of state, the principal axes of compression and their compressibility, the elastic constants, and the elastic moduli are reported for <math><mrow><mi>α</mi></mrow></math>-SnWO4 and for the two high-pressure phases.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416666"},"PeriodicalIF":2.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The impact of proton ion irradiation on Se70Te20In10 thin films: Linear and non-linear optical properties for photonic applications 质子离子辐照对 Se70Te20In10 薄膜的影响：用于光子应用的线性和非线性光学特性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-28 DOI: 10.1016/j.physb.2024.416663

Thabang K. Matabana , Conrad B. Tabi , Morgan Madhuku , Dineo P. Sebuso , Cosmas M. Muiva

{"title":"The impact of proton ion irradiation on Se70Te20In10 thin films: Linear and non-linear optical properties for photonic applications","authors":"Thabang K. Matabana , Conrad B. Tabi , Morgan Madhuku , Dineo P. Sebuso , Cosmas M. Muiva","doi":"10.1016/j.physb.2024.416663","DOIUrl":"10.1016/j.physb.2024.416663","url":null,"abstract":"<div><div>The examination of the linear and non-linear optical features was conducted on amorphous ternary Se70Te20 In10 thin films, which were exposed to proton irradiation energy of 3 MeV at varying fluences of <math><mrow><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>13</mn></msup></mrow></math>, <math><mrow><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>14</mn></msup></mrow></math>, <math><mrow><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>15</mn></msup></mrow></math> and <math><mrow><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>16</mn></msup></mrow></math> ions/cm2. The bulk sample was produced using the melt quenching method, and subsequently, thin films were obtained through electron beam evaporation. Calculations of linear and non-linear optical parameters were carried out based on transmittance and reflectance data acquired from UV–Vis–NIR spectroscopy spanning 300–2500 nm. Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) confirmed an amorphous phase in the films. The optical parameters showed strong dependency on the proton radiation fluence. In addition, the existence of minima or maxima for a number of parameters at a fluence of <math><mrow><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>14</mn></msup></mrow></math> ions/cm2 showed that this was the optimum fluence. The linear and non-linear properties showed that the sample have potential applications in photonic devices.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416663"},"PeriodicalIF":2.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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Enhanced flux pinning properties of Ga2O3: YBCO nanocomposite superconductor Ga2O3: YBCO 纳米复合超导体的增强磁通钉凝特性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-28 DOI: 10.1016/j.physb.2024.416669

Sandeep Kumar, Gaurav Kumar, Neeraj Khare

{"title":"Enhanced flux pinning properties of Ga2O3: YBCO nanocomposite superconductor","authors":"Sandeep Kumar, Gaurav Kumar, Neeraj Khare","doi":"10.1016/j.physb.2024.416669","DOIUrl":"10.1016/j.physb.2024.416669","url":null,"abstract":"<div><div>The effect of adding various concentrations (0.1–0.5 wt%) of Ga2O3 nanorods (NRs) on structural, electrical, magnetic, and flux pinning properties of the YBa2Cu O7-δ (YBCO) superconductor is studied. The critical current density (Jc) and flux pinning force (Fp) values are found to enhance significantly, and the nanocomposite sample with x = 0.2 wt% shows the maximum enhancement among the samples under study. At 4 K, the maximum value of Jc (Jcmax) and Fp (Fpmax) for the 0.2 wt% sample are ∼ 2.87 and 3 times higher and at 65 K, these increments are ∼ 3.54 and 3.4 times, as compared to pure YBCO respectively. Moreover, the Jc value for the composite samples has a lower decay with increasing temperature than the pure YBCO samples. The enhanced superconducting properties of the xGa2O3: YBCO can be attributed to the lattice defects induced by Ga2O3 NRs, which act as effective pinning centers.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416669"},"PeriodicalIF":2.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Magnetic properties of [(CoP)soft/(NiP)am/(CoP)hard/(NiP)am]n superlattices (CoP)软/(NiP)am/(CoP)硬/(NiP)am]n 超晶格的磁特性

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-28 DOI: 10.1016/j.physb.2024.416664

Gennadiy Patrin , Vitaly Orlov , Yaroslav Shiyan

{"title":"Magnetic properties of [(CoP)soft/(NiP)am/(CoP)hard/(NiP)am]n superlattices","authors":"Gennadiy Patrin , Vitaly Orlov , Yaroslav Shiyan","doi":"10.1016/j.physb.2024.416664","DOIUrl":"10.1016/j.physb.2024.416664","url":null,"abstract":"<div><div>We report on the results of experimental and theoretical studies of magnetic superlattices [(CoP)soft/(NiP)am/(CoP)hard/(NiP)am]n (n = 1, 5, 10, 15, 20, 40, tCoP = 5 nm, tNiP = 2 nm) produced by electroless deposition method. Cross-section electron microscopy image shows the layers do not mix and the interfaces between the layers are not blurred. We found the behavior of the magnetic hysteresis loops is similar to the exchange spring. Three peaks of microwave absorption are observed in the electron magnetic resonance spectra. To explain this, a model of a three-sublattice magnet with long-range interlayer interaction due to magnetic proximity effect is proposed. A perpendicular magnetic anisotropy is formed at the interface between the magnetic and non-magnetic layers. The interlayer interaction between the nearest magnetically soft and hard (J1) layers is found to be negative, the interaction between magnetically soft layers (J2) is positive, while J1 is about an order of magnitude greater than J2.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416664"},"PeriodicalIF":2.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Ground state phase diagrams of mixed spin (S,σ,σ,S) infinite alternating double-layers system of a cubic lattice for S=5/2 and σ=2 立方晶格混合自旋（S,σ,σ,S）无限交替双层体系在 S=5/2 和 σ=2 时的基态相图

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-28 DOI: 10.1016/j.physb.2024.416644

A. Maouhoubi , L. Ouzaroual , S. Mouchou , Y. Toual , A. Azouaoui , A. Hourmatallah , K. Bouslykhane , N. Benzakour

{"title":"Ground state phase diagrams of mixed spin (S,σ,σ,S) infinite alternating double-layers system of a cubic lattice for S=5/2 and σ=2","authors":"A. Maouhoubi , L. Ouzaroual , S. Mouchou , Y. Toual , A. Azouaoui , A. Hourmatallah , K. Bouslykhane , N. Benzakour","doi":"10.1016/j.physb.2024.416644","DOIUrl":"10.1016/j.physb.2024.416644","url":null,"abstract":"<div><div>The ground state phase diagrams of a cubic lattice of infinite mixed spin <math><mrow><mo>(</mo><mrow><mi>S</mi><mo>,</mo><mi>σ</mi><mo>,</mo><mi>σ</mi><mo>,</mo><mi>S</mi></mrow><mo>)</mo></mrow></math> double-layers have been studied at a temperature of <math><mrow><mi>T</mi><mo>=</mo><mn>0</mn><mspace></mspace><mi>K</mi></mrow></math> with the Blume-Capel model spins <math><mrow><mi>S</mi><mo>=</mo><mn>5</mn><mo>/</mo><mn>2</mn></mrow></math> and <math><mrow><mi>σ</mi><mo>=</mo><mn>2</mn></mrow></math>. The parameters used are the couplings describing the interactions between the first nearest neighbor spins, <math><mrow><msub><mi>J</mi><mn>1</mn></msub></mrow></math> for <math><mrow><mi>S</mi><mo>‑</mo><mi>S</mi></mrow></math>, <math><mrow><msub><mi>J</mi><mn>2</mn></msub></mrow></math> for <math><mrow><mi>σ</mi><mo>‑</mo><mi>σ</mi></mrow></math> and <math><mrow><msub><mi>J</mi><mn>3</mn></msub></mrow></math> for <math><mrow><mi>S</mi><mo>‑</mo><mi>σ</mi></mrow></math>; the crystal field <math><mrow><mo>Δ</mo></mrow></math> and the external magnetic field <math><mrow><mi>h</mi></mrow></math>. We have analyzed the phase diagrams obtained by exact calculations of our model. The obtained phases were listed in the planes between the parameters of our system and showed an abundance of ferromagnetic (FM), antiferromagnetic (AFM), nonmagnetic (NM), and ferrimagnetic (FiM) phases. The effect of the external magnetic field on the system configurations has been studied.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416644"},"PeriodicalIF":2.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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Effect of pressure on the structure, elasticity and optical properties of AgGaSe2 crystal 压力对 AgGaSe2 晶体结构、弹性和光学特性的影响

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2024-10-26 DOI: 10.1016/j.physb.2024.416668

Zhen Fan , Guangyong Jin , Hongxu Liu , Ye Li

{"title":"Effect of pressure on the structure, elasticity and optical properties of AgGaSe2 crystal","authors":"Zhen Fan , Guangyong Jin , Hongxu Liu , Ye Li","doi":"10.1016/j.physb.2024.416668","DOIUrl":"10.1016/j.physb.2024.416668","url":null,"abstract":"<div><div>The AgGaSe2 crystal has garnered widespread attention due to its excellent nonlinear properties and wide infrared transmittance. However, its relatively low bandgap value leads to a lower laser damage threshold, which affects its further applications. This paper investigates the changes in the structure, elasticity, and optical properties of the AGSe crystal under hydrostatic pressure using first-principles calculations based on density functional theory. During the pressure variation from −7 GPa to 13 GPa, the volume and the lattice constant c gradually decrease, while the density increases. The lattice constant a first decreases and then increases. As pressure gradually increases, the bandgap slowly opens, reaching a peak value of 2.373 eV at 12 GPa, which increases by 0.537 eV compared to 0 GPa. Elastic constants were further calculated, and the Born stability criterion confirmed the stable structure of the crystal at 12 GPa. Additionally, Young's modulus and Poisson's ratio were calculated at different pressures. The optical property calculations show that under a pressure of 12 GPa, the peak absorption coefficient of the crystal decreases and shifts towards lower energy regions. Pressure also leads to an increase in the crystal's transmittance between 20 eV and 40 eV.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"696 ","pages":"Article 416668"},"PeriodicalIF":2.8,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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