Journal of Magnetism and Magnetic Materials最新文献_第10页

Application of mechanical force generated by magnetic nanoparticles under magnetic field in tumor treatment 磁性纳米颗粒在磁场作用下产生机械力在肿瘤治疗中的应用

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-15 DOI: 10.1016/j.jmmm.2025.172982

Sinan Zhang , Tong Gao , Xi Chu , Chuanfang Chen

引用次数: 0

Computational prediction of phase-stability skyrmion maps, internal magnetic configuration, and size of magnetic skyrmions in confined magnetic nanostructures 限制磁性纳米结构中相稳定性斯基米子图、内部磁构型和磁基米子尺寸的计算预测

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-15 DOI: 10.1016/j.jmmm.2025.172960

A.E. Vidal , J.W. Alegre , Y. Núñez , H.N. Vergara , J.I. Costilla , A. Talledo , B.R. Pujada

{"title":"Computational prediction of phase-stability skyrmion maps, internal magnetic configuration, and size of magnetic skyrmions in confined magnetic nanostructures","authors":"A.E. Vidal , J.W. Alegre , Y. Núñez , H.N. Vergara , J.I. Costilla , A. Talledo , B.R. Pujada","doi":"10.1016/j.jmmm.2025.172960","DOIUrl":"10.1016/j.jmmm.2025.172960","url":null,"abstract":"<div><div>In this paper, we present a computational study predicting the phase-stability skyrmion maps, internal magnetic configuration, and radii of magnetic skyrmions in rectangular magnetic nanostructures, using machine learning (ML) algorithms. The rectangular magnetic nanostructures have a fixed length of 128 nm and variable widths ranging from 56 and 128 nm. The study considers different values of perpendicular magnetic anisotropy and the Dzyaloshinskii-Moriya interaction constants. Artificial neural networks (ANNs) and Generative Adversarial Networks (GANs) were successfully employed to predict phase-stability skyrmion maps, internal magnetization images, and magnetization profiles along the z-axes for circular magnetic skyrmions. These predictions were validated through simulations using the micromagnetic Mumax3 program, demonstrating the success of the machine learning approach despite the complexity of the magnetic interactions. The results of this work highlight the potential of machine learning algorithms in advancing the study of magnetic skyrmions in confined magnetic nanostructures by accurately predicting a wide range of scenarios in a significant short time.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"622 ","pages":"Article 172960"},"PeriodicalIF":2.5,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orientational phase transition by magnetic field in anisotropic non-heisenberg magnet with S = 1 S = 1各向异性非海森堡磁体中磁场的取向相变

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-14 DOI: 10.1016/j.jmmm.2025.172958

O.A. Kosmachev, Yu. A. Fridman, E.A. Yarygina

引用次数: 0

Interplay between geometry and spin dynamics in elongated magnetic nanoislands: Elliptical vs stadium-shaped cases 细长磁纳米岛的几何和自旋动力学之间的相互作用：椭圆与体育场形状的情况

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-14 DOI: 10.1016/j.jmmm.2025.172939

Eduardo Saavedra , Piero Terruzzi , Juan Luis Palma , Juan Escrig

引用次数: 0

Magnetoelastic wave caustic pattern dependency on direction of magnetic field in Fe82Ga18 crystals Fe82Ga18晶体磁弹性波焦散模式与磁场方向的关系

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-14 DOI: 10.1016/j.jmmm.2025.172938

S.M. Bakharev, M.A. Borich, S.P. Savchenko

引用次数: 0

Two-dimensional ferromagnetic penta-FeP2 with high Curie temperature and carrier mobility 具有高居里温度和载流子迁移率的二维铁磁性五极fep2

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-14 DOI: 10.1016/j.jmmm.2025.172969

Bo Meng, Ou Man Lin, Hongyun Zhang

{"title":"Two-dimensional ferromagnetic penta-FeP2 with high Curie temperature and carrier mobility","authors":"Bo Meng, Ou Man Lin, Hongyun Zhang","doi":"10.1016/j.jmmm.2025.172969","DOIUrl":"10.1016/j.jmmm.2025.172969","url":null,"abstract":"<div><div>In this work, we investigated the stability, electronic structures, and magnetic properties of a 2D pentagonal iron phosphide (penta-FeP2) through density functional theory (DFT) calculations. The predicted penta-FeP2 is an FM semiconductor with thermal, dynamical, and mechanical stability, and narrow direct band gap of 0.916 eV. The estimated TC surpasses 705 K, which is sufficiently higher than room temperature. The MAE is as high as 358 μeV/Fe, which enhances the FM stability of the penta-FeP2. In addition, the 2D material also exhibits ultrahigh mobility for both holes and electrons. The light electron mobility is up to 21, 992 cm2 V−1 s−1, while the light hole mobility is 2, 890 cm2 V−1 s−1. It also exhibits isotropic visible light absorption and a low lattice thermal conductivity of ∼20 W m−1 K−1 at room temperature. The 2D FeP2 displays a number of desirable properties, including excellent stability, high TC, large MAE, high carrier mobility, and a direct band gap. These characteristics make it a promising candidate for spintronic devices.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"622 ","pages":"Article 172969"},"PeriodicalIF":2.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of transient electromagnetic fields in electromagnetic rail launcher using an adaptive recursive algorithm 基于自适应递归算法的电磁轨道发射器瞬态电磁场分析

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-13 DOI: 10.1016/j.jmmm.2025.172955

Yu-ting Zhang , Zhen-chun Wang

{"title":"Analysis of transient electromagnetic fields in electromagnetic rail launcher using an adaptive recursive algorithm","authors":"Yu-ting Zhang , Zhen-chun Wang","doi":"10.1016/j.jmmm.2025.172955","DOIUrl":"10.1016/j.jmmm.2025.172955","url":null,"abstract":"<div><div>Modeling the electromagnetic rail launch is a critical aspect that provides solid theoretical support for the design and optimization of launch systems. This paper comprehensively considers factors such as armature shape, rail shape, and the skin effect of current to establish a dynamic electromagnetic field model for an H-shaped armature in electromagnetic rail launch. To achieve efficient solutions, an adaptive recursive numerical analysis method is proposed. This method recursively segments the integration intervals of various variables and employs adaptive Simpson’s numerical integration for regression once the integration nodes are determined. This successfully enables the rapid resolution of the dynamic electromagnetic field model, yielding a time-varying inductance gradient. Subsequently, the Runge-Kutta method is used to calculate the velocity and displacement curves of the armature. Experimental validation of the model indicates a 2.28% error in the calculated muzzle velocity of the armature and a maximum error of 4.48% during the launch process. These results strongly validate the proposed model and the adaptive recursive numerical analysis method, providing strong evidence for theoretical analysis in electromagnetic launch technology.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"622 ","pages":"Article 172955"},"PeriodicalIF":2.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of demagnetizing effect on the shape and broadening of magnetoresistance curves 退磁效应对磁阻曲线形状和展宽的影响

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-12 DOI: 10.1016/j.jmmm.2025.172947

L. Péter , L.F. Kiss, I. Bakonyi

{"title":"Influence of demagnetizing effect on the shape and broadening of magnetoresistance curves","authors":"L. Péter , L.F. Kiss, I. Bakonyi","doi":"10.1016/j.jmmm.2025.172947","DOIUrl":"10.1016/j.jmmm.2025.172947","url":null,"abstract":"<div><div>It was observed in recent magnetoresistance studies on elongated strip-shaped thin foil samples that the MR(H) hysteresis curves have different shapes and widths in the longitudinal (L) configuration (field H parallel with the measuring current) and in the transverse (T) configuration (field H transverse to the measuring current). Subsequent magnetic measurements [L.F. Kiss et al., Eur. Phys. J Plus 139, 844 (2024)] of similar strip-shaped samples taken with different field orientations (corresponding either to the LMR or TMR configurations of the magnetoresistance measurements) revealed differences also in the M(H) magnetization curves, which are attributed to demagnetizing effects. After correcting for the demagnetizing field, the transverse M(H) curves could be brought in fairly good overlap with the measured longitudinal M(H) curves. In the present work, results of MR(H) measurements are reported on strips of the same Ni-Co alloys and pure Ni metal which were used in the M(H) study. Based on this recent work on the M(H) curves, one can now explain the differences in the shape and width of the LMR(H) and TMR(H) curves of a given material in a fully quantitative manner by taking into account the demagnetizing effects. Similarly to the transverse M(H) curves, the TMR(H) curves could also be corrected for the demagnetizing field, yielding good agreement with the LMR(H) curves. Furthermore, whereas the LMR(H) curves exhibited a normal hysteresis corresponding to the hysteresis behavior of the M(H) curve, the TMR(H) curves showed an anomalous behavior which can also be ascribed to demagnetizing effects. The same holds true also for the polar magnetoresistance curves PMR(H) measured in a magnetic field perpendicular to the strip plane.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"622 ","pages":"Article 172947"},"PeriodicalIF":2.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new anticrossing region of monoisotopic impurity 53Cr ions in Y2SiO5 Y2SiO5中单同位素杂质53Cr离子的新反交区

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-12 DOI: 10.1016/j.jmmm.2025.172956

R.B. Zaripov, I.T. Khairutdinov, V.F. Tarasov, Yu.E. Kandrashkin

{"title":"A new anticrossing region of monoisotopic impurity 53Cr ions in Y2SiO5","authors":"R.B. Zaripov, I.T. Khairutdinov, V.F. Tarasov, Yu.E. Kandrashkin","doi":"10.1016/j.jmmm.2025.172956","DOIUrl":"10.1016/j.jmmm.2025.172956","url":null,"abstract":"<div><div>The monoisotopic impurity ions of 53Cr in a single crystal of yttrium orthosilicate (Y2SiO5) have been studied by the electron paramagnetic resonance (EPR). Several X-band EPR spin transitions of the chromium ion (S = 3/2) were recorded in magnetic fields up to 1.7 T. The chromium ion exhibited a substantial fine structure of spin sublevels, with two doublets split by 53 GHz. As a consequence of the high anisotropy of the zero-field interactions, the resonance conditions of the EPR transitions are strongly dependent on the direction of the external magnetic field relative to the crystallographic axes. In some orientations, the nonlinear dependence of the spin sublevels on the magnetic field leads to the formation of an anticrossing between spin states with projections <math><mrow><msub><mi>m</mi><mi>S</mi></msub><mo>=</mo><mo>+</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math> and <math><mrow><msub><mi>m</mi><mi>S</mi></msub><mo>=</mo><mo>-</mo><mn>3</mn><mo>/</mo><mn>2</mn></mrow></math>. In addition to this well established anticrossing region, a new region formed by the states with projections <math><mrow><msub><mi>m</mi><mi>S</mi></msub><mo>=</mo><mo>-</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math> and <math><mrow><msub><mi>m</mi><mi>S</mi></msub><mo>=</mo><mo>-</mo><mn>3</mn><mo>/</mo><mn>2</mn></mrow></math> has been identified. It appears near the upper limit of the EPR spectrometer (1.7 T), where the core of the spectrometer magnet approaches saturation. The EPR spectra of the scandium endofullerene Sc2@C80(CH2Ph) are taken as a standard to calibrate the magnetic field in this regime. This procedure enables a more accurate determination of the fine structure of the chromium ion. The values D = 25.07 GHz and E = 5.29 GHz are derived by comparing calibrated experimental data with numerical simulations.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"622 ","pages":"Article 172956"},"PeriodicalIF":2.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement in magnetocaloric, mechanical and corrosion properties of La1.4Fe11Co0.8Si1.2 bulk composites prepared by hot-deformation and diffusion annealing 热变形扩散退火法制备La1.4Fe11Co0.8Si1.2块体复合材料的磁热、力学和腐蚀性能的改善

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-03-12 DOI: 10.1016/j.jmmm.2025.172944

X.C. Zhong , Z.H. Liao , G.P. Li , X. Huang , J.H. Huang , C.L. Liu , Y.D. Zhang , Z.W. Liu , D.L. Jiao , W.Q. Qiu , R.V. Ramanujan

{"title":"Improvement in magnetocaloric, mechanical and corrosion properties of La1.4Fe11Co0.8Si1.2 bulk composites prepared by hot-deformation and diffusion annealing","authors":"X.C. Zhong , Z.H. Liao , G.P. Li , X. Huang , J.H. Huang , C.L. Liu , Y.D. Zhang , Z.W. Liu , D.L. Jiao , W.Q. Qiu , R.V. Ramanujan","doi":"10.1016/j.jmmm.2025.172944","DOIUrl":"10.1016/j.jmmm.2025.172944","url":null,"abstract":"<div><div>La-Fe-Si alloys are of high interest for near room temperature magnetocaloric applications. La1.4Fe11Co0.8Si1.2 magnetocaloric composites were prepared by hot-deformation and diffusion annealing to improve the kinetics of the formation rate of the desired 1:13 phase and reduce its brittleness. The effects of La1.4Fe11Co0.8Si1.2 particle size on the formation of 1:13 phase, as well as the magnetocaloric, mechanical and corrosion properties were investigated. The results showed that the process deployed in this work shortened the annealing time and promoted the formation of 1:13 phase. The initial particle size influenced phase formation during diffusion annealing. For smaller particle size, the 1:13 phase content and microstructural homogeneity were enhanced after annealing. The diffusion distance between the La-rich phase and the α-Fe phase decreased. Significantly, the bulk composites exhibited a large magnetic entropy change (5.6–6.1 J·kg−1·K−1, μ0ΔH = 2 T) and high refrigeration cooling power (128.7–142.1 J·kg−1) near room temperature owing to its high 1:13 phase content. These composites also had large bending strength and good corrosion resistance. Thus, this processing technology was demonstrated to be a facile method to fabricate magnetocaloric composites with excellent near room temperature performance.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"622 ","pages":"Article 172944"},"PeriodicalIF":2.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0