Journal of Superconductivity and Novel Magnetism最新文献_第7页

Adsorption Characteristics of the Anticancer Drug Hydroxyurea with Armchair BN Graphene Nanoribbons Containing and Lacking Vacancy Defects: Insight via DFT Calculations 抗癌药物羟基脲与含有和缺乏空位缺陷的 Armchair BN 石墨烯纳米带的吸附特性：通过 DFT 计算获得的启示

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-14 DOI: 10.1007/s10948-024-06779-6

Alaa M. Khudhair, Ali Ben Ahmed

{"title":"Adsorption Characteristics of the Anticancer Drug Hydroxyurea with Armchair BN Graphene Nanoribbons Containing and Lacking Vacancy Defects: Insight via DFT Calculations","authors":"Alaa M. Khudhair, Ali Ben Ahmed","doi":"10.1007/s10948-024-06779-6","DOIUrl":"10.1007/s10948-024-06779-6","url":null,"abstract":"<div>The identification of suitable nanocarriers for drug delivery has been a constant area of research and development. Two-dimensional nanomaterials based on graphene have been presented and proven as drug carriers in this instance. In this study, we employed calculations from density functional theory to examine the electronic and adsorption properties of the commonly administered anticancer medication hydroxyurea (HU) on armchair BN graphene nanoribbons with and without vacancy defects. The band gap of the structures, both with and without the presence of an anticancer drug, exhibits semiconductor behavior, with the exception of ABNNR which initially exhibits insulator behavior with a 6.009 eV energy gap, but upon interaction with the HU molecule, the energy disparity diminished to 4.72 eV. With an Eads = − 1.079 eV, the adsorption energy of the HU drug molecule on ABNNR-VN is significantly greater than that of the other complex structures. Based on the computed structural and electronic characteristics, it has been determined that HU/ABNNR-VN exhibits a greater propensity for HU molecule adsorption in comparison to alternative structures.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 8-10","pages":"1509 - 1518"},"PeriodicalIF":1.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141342851","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

Effect of Low-level Doping With Strontium On Structure, Magnetism, and Electron States in SmMnO3 Manganite 低浓度掺杂锶对 SmMnO3 锰矿结构、磁性和电子状态的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-14 DOI: 10.1007/s10948-024-06768-9

Larisa Vedmid, Olga Fedorova, Andrey Fetisov, Sergey Uporov

{"title":"Effect of Low-level Doping With Strontium On Structure, Magnetism, and Electron States in SmMnO3 Manganite","authors":"Larisa Vedmid, Olga Fedorova, Andrey Fetisov, Sergey Uporov","doi":"10.1007/s10948-024-06768-9","DOIUrl":"10.1007/s10948-024-06768-9","url":null,"abstract":"<div>Manganites of rare earth elements are currently promising materials for electronics, catalysis, current sources and other applications. Their widespread demand is caused by a variety of structural and magnetic effects connected with substitutions in the sublattices of rare earth element and manganese. Substitutions of rare earth element by Sr, Ca, or Ba in manganites are known to impact the Jahn-Teller (JT) transition temperature as well as the concentration of Mn3+ and Mn4+ ions, which influences the efficiency of double exchange in magnetic orderings. In this work, solid solution Sm1-xSrxMnO3 with low concentrations of the substituting element x = 0; 0.15; 0.25 has been studied using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermal analysis, and magnetometry. Samarium manganites have a perovskite-like orthorhombic structure (Pbnm space group). It has been shown that the Sm-by-Sr substitution leads to a gradual increase in the valence of manganese from 3 + to intermediate value 3.67+. This is accompanied by an increase Néel temperature in (TN) from 56 K at x = 0 to 90 K at x = 0.25, in the paramagnetic Curie temperature (Θ) from − 30.3 K at x = 0 to 119.9 K at x = 0.25, as well as in the value of the saturation magnetic moment (µS) from 0.27 µB at x = 0 to 3.49 µB at x = 0.25. In addition, such substitution leads to a decrease in the temperature of the JT structural transition from 996 ºC at x = 0.0 to 252 ºC at x = 0.25. The relationship between the magnetic properties and the crystal structure of samarium manganites is discussed.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 8-10","pages":"1429 - 1442"},"PeriodicalIF":1.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141343683","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

Prediction of Hard Magnetic Properties for Melt-Spun Nd2Fe14B and Nd2Fe14B/Fe3B Based on Machine Learning 基于机器学习的熔融纺丝 Nd2Fe14B 和 Nd2Fe14B/Fe3B 硬磁特性预测

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-12 DOI: 10.1007/s10948-024-06775-w

J. T. Wen, H. G. Hu, J. S. An, T. Han, J. F. Hu

{"title":"Prediction of Hard Magnetic Properties for Melt-Spun Nd2Fe14B and Nd2Fe14B/Fe3B Based on Machine Learning","authors":"J. T. Wen, H. G. Hu, J. S. An, T. Han, J. F. Hu","doi":"10.1007/s10948-024-06775-w","DOIUrl":"10.1007/s10948-024-06775-w","url":null,"abstract":"<div>The permanent magnetic properties of Nd-Fe-B magnets strongly depend on the alloy composition. Machine learning is based on mathematical and information science methods and uses existing Nd-Fe-B data to predict the magnetic properties of Nd-Fe-B materials. We use the ensemble learning boosting method to establish the gradient boosting regression tree (GBRT) model for Nd2Fe14B melt-spun bonded magnets, in comparison with three other methods of machine learning: support vector machine (SVR), multiple linear regression (MLR), and random forest (RFR). The results show that the machine learning GBRT model developed using the ensemble learning algorithm has higher prediction accuracy and better stability than those three traditional machine learning (SVR, MLR, RFR) models used in the past to predict the magnetic properties of melt-spun Nd-Fe-B bonded magnets. We also used the GBRT model to predict hard magnetic properties of melt-spun Nd2Fe14B/Fe3B composite materials. Several new alloy compositions of melt-spun Nd-Fe-B bonded magnets and Nd2Fe14B/Fe3B composite materials with high-performances were also predicted. Machine learning based on the GBRT model can play an important role in the design, preparation, and development of melt-spun Nd2Fe14B bonded magnets and Nd2Fe14B/Fe3B composite materials.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 8-10","pages":"1443 - 1452"},"PeriodicalIF":1.6,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141354336","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

The Effect of Boron on Equilibrium of Superconducting Phases in Bi-Pb-Sr-Ca-Cu-O System 硼对 Bi-Pb-Sr-Ca-Cu-O 体系中超导相平衡的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-06 DOI: 10.1007/s10948-024-06767-w

S. M. Starrynets

{"title":"The Effect of Boron on Equilibrium of Superconducting Phases in Bi-Pb-Sr-Ca-Cu-O System","authors":"S. M. Starrynets","doi":"10.1007/s10948-024-06767-w","DOIUrl":"10.1007/s10948-024-06767-w","url":null,"abstract":"<div>The crystal structures of type 1234 and 2234 are not found in compositions Bi1-xBxSr2Ca3Cu4Oy and Bi2-xBxSr2Ca3Cu4Oy after synthesis under conditions of ambient pressure P = 1 bar and T = 835 °C for τ = 240 h. This conclusion is obtained as a result of the fact that the series of bismuth superconductors Bi1-xBxSr2Ca3Cu4Oy, Bi2-xBxSr2Ca3Cu4Oy, Bi2-xBxSr2Ca2Cu3Oy, Bi1.7-xBxPb0.3Sr2Ca2Cu3Oy with different boron content x = 0-2 were synthesized followed by slow (rate < 10 °C/sec) cooling or quenching (< 100 °C/sec). Samples of Bi1.7-xBxPb0.3Sr2Ca2Cu3Oy with a boron content of x = 0.5 have a significant (> 35%) proportion of the superconducting phase 2223, regardless of the accuracy of observing the temperature modes of synthesis (in temperature ranges < ±10 °C) and cooling after it. A model of the effect of boron on phase equilibrium in Bi-Pb-Sr-Ca-Cu-O system is proposed using the process of boron-bismuth glass formation. Therefore, the boron addition during the synthesis of bismuth superconductors will increase the production process reproducibility of phase 2223. Also, this technology can be used at the synthesis of superconductors from the boron-bismuth not very enriched ores in conditions of limited available resources.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 5-7","pages":"1079 - 1088"},"PeriodicalIF":1.6,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377594","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 Magnetic Core Properties of Ultra-Thin Flaky FeSiAl Alloy Powders Through High-Temperature Reduction Treatment 通过高温还原处理增强超薄片状铁硅铝合金粉末的磁芯特性

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-04 DOI: 10.1007/s10948-024-06772-z

Lunjia Du, Jianwen Chen, Qingqing Zhang, Zhimei Long, Chaoqun Li, Jiaqi Lai, Lan Liu, Te Hu, Yilong Ma, Bin Shao

{"title":"Enhancing the Magnetic Core Properties of Ultra-Thin Flaky FeSiAl Alloy Powders Through High-Temperature Reduction Treatment","authors":"Lunjia Du, Jianwen Chen, Qingqing Zhang, Zhimei Long, Chaoqun Li, Jiaqi Lai, Lan Liu, Te Hu, Yilong Ma, Bin Shao","doi":"10.1007/s10948-024-06772-z","DOIUrl":"10.1007/s10948-024-06772-z","url":null,"abstract":"<div>The surface properties of ultra-thin flaky FeSiAl alloy powders with a thickness of 0.65 μm were modified through a high-temperature reduction process. The original FeSiAl alloy powders exhibited an inherent outer layer primarily composed of FeOx, SiAlxOy, and Al2O3. The reduction process involved the reduction of Fe3+ to metallic Fe through the use of H2. During the pressing process of the magnetic core, the flaky FeSiAl alloy powders naturally formed a stack structure with the (100) orientation. Following the reduction treatment, the FeSiAl magnetic core demonstrated an effective permeability as high as 624 at 100 kHz, with a total loss of 108.8 mW/cm3 under maximal applied fields of 50 mT at 100 kHz. These results reveal that high-temperature reduction treatment and reduction in the thickness of flaky FeSiAl alloy powders play the significant role in further enhancing their magnetic core properties.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 8-10","pages":"1593 - 1601"},"PeriodicalIF":1.6,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253192","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

Tuning the Magnetic and Electrical Properties of LaYFe2O6 by Mn Substitution 通过锰置换调谐 LaYFe2O6 的磁性和电性

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-04 DOI: 10.1007/s10948-024-06770-1

R. Ghosh, A. Barik, M. R. Sahoo, S. Mishra, P. N. Vishwakarma

{"title":"Tuning the Magnetic and Electrical Properties of LaYFe2O6 by Mn Substitution","authors":"R. Ghosh, A. Barik, M. R. Sahoo, S. Mishra, P. N. Vishwakarma","doi":"10.1007/s10948-024-06770-1","DOIUrl":"10.1007/s10948-024-06770-1","url":null,"abstract":"<div>Herein, we report a fundamental study revealing the substantial change in magnetic and electrical properties promoted by manganese (Mn) substitution in the iron (Fe) site of double perovskite LaYFe2O6 [LaYFe2-xMnxO6; x = 0, 0.05, 0.10, and 0.15], which is prepared by the sol–gel auto-combustion method. The structural, morphological, magnetic, and electrical properties of all the samples are investigated to explore the influence of Mn in the compound. X-ray diffraction (XRD) study reveals the confirmation of phase formation with orthorhombic crystal structure having symmetries P21nm and Pbnm (small contribution). X-ray photoelectron spectroscopy (XPS) analysis corroborates the mixed valence state of Fe and Mn, while the dominancy of + 3 oxidation state can be confirmed for them. Magnetization study reveals that the transition temperature reduces drastically (~ 100 K) by the Mn substitution and approaches toward room temperature (RT). At 573 K, the maximum magnetization value enhanced up to ~ 30% by the Mn substitution. Grain boundary contribution in the electrical response is more prominent in the higher Mn content samples. The application of DC magnetic field exhibits a significant influence on the impedance spectra due to the substitution of Mn in the lattice, which corroborates the signature of magnetoelectric (ME) coupling. The presence of ME coupling is further confirmed by the direct magnetoelectric measurement. This finding along with the above RT magnetic transition could make it a feasible candidate for ME-based applications.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 5-7","pages":"1257 - 1268"},"PeriodicalIF":1.6,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253247","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

A Novel Method to Enhance the Content and size of Y-211 Particles in YBCO bulk Superconductors Grown by RE+011 TSIG Process 提高通过 RE+011 TSIG 工艺生长的 YBCO 体超导体中 Y-211 粒子含量和尺寸的新方法

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-06-03 DOI: 10.1007/s10948-024-06757-y

Abulizi Abulaiti, Li Jia-Wei, Chen Sen-Lin, Yang Wan-Min

{"title":"A Novel Method to Enhance the Content and size of Y-211 Particles in YBCO bulk Superconductors Grown by RE+011 TSIG Process","authors":"Abulizi Abulaiti, Li Jia-Wei, Chen Sen-Lin, Yang Wan-Min","doi":"10.1007/s10948-024-06757-y","DOIUrl":"10.1007/s10948-024-06757-y","url":null,"abstract":"<div>In this research, a novel method to improve the particle size and content of Y2BaCuO5 (Y-211) in YBa2Cu3O7 − x (YBCO) bulks was demonstrated. The single-domain YBCO bulks (20 mm in diameter) have been fabricated employing the RE+011 TSIG technique with different heating rates during the liquid phase infiltration (LPI) stage. The various heating rates on Y-211 size and its content in the final YBCO samples has been investigated in detail. The findings suggest that the average size of the Y-211 particles in the Y-123 matrix initially decreases followed by an increase, while its volume fraction gradually decreases with increasing heating rate. Furthermore, it is observed that the levitation force and the trapped fields exhibit an initial increase followed by a subsequent decrease as the heating rate increases. Among all the samples, sample S3 (heating rate of 30 °C/h) has the best magnetic levitation force and trapped field performances at 77 K, i.e., the largest values are of 45.3 N and 0.41 T, respectively. The results suggest that, while employing the RE+011 TSIG technique for YBCO bulk fabrication, the average size and volume fraction of Y-211 particles in the final sample can be further enhanced by controlling the heating rates during the LPI stage, obviating any need for chemical refining agents.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 5-7","pages":"853 - 859"},"PeriodicalIF":1.6,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253454","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

Normal Metal–Insulator–Superconductor Aharonov-Bohm Interferometer 普通金属-绝缘体-超导体阿哈诺夫-玻姆干涉仪

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-05-31 DOI: 10.1007/s10948-024-06762-1

K. Yu. Arutyunov, A. S. Gurskiy, E. Ph. Pozdnyakova, D. L. Shapovalov, Guang-Wei Deng, A. M. Chekushkin, M. A. Markina, M. A. Tarasov

引用次数: 0

Meckel's Diverticulum Fistulating into the Rectum: An Extremely Uncommon Presentation. 梅克尔憩室瘘入直肠：一种极为罕见的病例。

4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-05-30 eCollection Date: 2024-05-01 DOI: 10.5001/omj.2024.19

Raghav Narang, Shishir Kumar, Aravindh Radhakrishnan, Prakriti Giri, Yogesh Kumar Sarin

引用次数: 0

Magnetization Switching Dynamics of Electrodeposited Fe–Ni Thin Films 电沉积铁-镍薄膜的磁化切换动力学

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-05-27 DOI: 10.1007/s10948-024-06766-x

Kapil Dev, Ankit Kadian, V. R. Reddy, Rohit Medwal, S. Annapoorni

{"title":"Magnetization Switching Dynamics of Electrodeposited Fe–Ni Thin Films","authors":"Kapil Dev, Ankit Kadian, V. R. Reddy, Rohit Medwal, S. Annapoorni","doi":"10.1007/s10948-024-06766-x","DOIUrl":"10.1007/s10948-024-06766-x","url":null,"abstract":"<div>Magnetic thin films with fast magnetization switching and low Gilbert damping are crucial for devices working at high frequency with low power consumption. In this work, composition-controlled high-quality Fe–Ni alloy thin films were electrodeposited on ITO/glass substrates and their magnetization switching behavior was investigated using MOKE and FMR. The phase of deposited alloy transformed from FCC to mixed BCC and FCC for high Fe content films. All the deposited alloy films display granular morphology and possess soft magnetic characteristics with low coercivity (Hc < 50 Oe). Magneto-optic Kerr effect hysteresis along with simultaneous domain imaging reveals that the alloy composition influences anisotropy, domain structure, and magnetization switching process. The alloyed films exhibited fourfold surface anisotropy. The magnetization reversal in pure Fe and Ni samples occurs through stripe-like domains, whereas band and ripple-like domains were evident for the alloyed films. Fast magnetization switching within a minimum field range of ~ 3 Oe was observed for Fe25Ni75 sample. The ferromagnetic resonance measurements revealed that the Fe25Ni75 alloy films exhibit lowest Gilbert damping (α = 0.024) compared to pure Fe and Ni films. In summary, these findings offer valuable insight for tailoring the magnetic properties of Fe–Ni alloy thin films with appropriate alloy composition.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"37 5-7","pages":"1243 - 1255"},"PeriodicalIF":1.6,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167042","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