Journal of Magnetism and Magnetic Materials最新文献_第7页

Quadrupolar phases and plateau states in skewed ladders 歪斜梯子的四极相和平台态

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-17 DOI: 10.1016/j.jmmm.2025.173262

Sambunath Das , Dayasindhu Dey , Manoranjan Kumar , S. Ramasesha

{"title":"Quadrupolar phases and plateau states in skewed ladders","authors":"Sambunath Das , Dayasindhu Dey , Manoranjan Kumar , S. Ramasesha","doi":"10.1016/j.jmmm.2025.173262","DOIUrl":"10.1016/j.jmmm.2025.173262","url":null,"abstract":"<div><div>Two legged skewed spin-<math><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac></math> ladders are frustrated and exhibit exotic quantum phases in ground state due to strong quantum fluctuations and competing spin exchanges. Here, we study ground state properties of a spin-<math><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac></math> Heisenberg model on 3/4, 3/5 and 5/5 skewed ladders in the presence of a Zeeman magnetic field, <math><mi>B</mi></math>, using exact diagonalization and the density matrix renormalization group method. We note the existence of plateaus at <math><mrow><mi>m</mi><mo>=</mo></mrow></math> 1/3 and 2/3 for 3/4 skewed ladder, at <math><mrow><mi>m</mi><mo>=</mo></mrow></math> 1/4, 1/2, and 3/4 for 3/5 skewed ladder, and at <math><mrow><mi>m</mi><mo>=</mo><mn>0</mn></mrow></math>, 1/3, and 2/3 for 5/5 skewed ladder, where <math><mi>m</mi></math> is the ratio of the observed magnetization (<math><mi>M</mi></math>) to the saturated magnetization (<math><msub><mrow><mi>M</mi></mrow><mrow><mi>max</mi></mrow></msub></math>). The plateau state is always a gapped state and the plateau width depends on the gap in the system. Surprisingly, the 3/4 and 5/5 skewed ladders show interesting quadrupolar or n-type spin nematic phases below the 1/3rd plateau, i.e, at very low magnetic fields. These two systems are unique as they host both a plateau and a quadrupolar phase at low magnetic fields. The linear variation of pitch angle of the spin with magnetization and behavior of binding energy of magnon pairs as function of magnetic field are also calculated in both the systems. We also study the contribution of the binding energy to two magnon condensate.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173262"},"PeriodicalIF":2.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321469","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

Floating performance of tiny non-magnetic particles in ferrofluids 微小非磁性颗粒在铁磁流体中的漂浮性能

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-16 DOI: 10.1016/j.jmmm.2025.173292

Liu Li , Decai Li , Yunqi Guo

引用次数: 0

Magnetic and magnetocaloric properties of the two-dimensional Ln2(phthalate)3(H2O) (Ln = Gd-Dy) framework series 二维Ln2（邻苯二甲酸盐）3(H2O) （Ln = Gd-Dy）骨架系列的磁性和磁热学性质

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-16 DOI: 10.1016/j.jmmm.2025.173253

Patrick W. Doheny , Gavin B.G. Stenning , Paul J. Saines

引用次数: 0

Ultrafast spin dynamics and spin transport in ferromagnetic spin valve 铁磁自旋阀的超快自旋动力学与自旋输运

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-16 DOI: 10.1016/j.jmmm.2025.173247

V.N. Gridnev

引用次数: 0

Magnetic ground state of the new perovskite variant Ba3CoSn2O9 新钙钛矿变体Ba3CoSn2O9的磁基态

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-16 DOI: 10.1016/j.jmmm.2025.173241

Santanu De , Supratik Mukherjee , Rahul Singh , S. Karmakar , Shipra Das , U.K. Goutam , R. Rawat , G. Vaitheeswaran , P.N. Santhosh

引用次数: 0

Voltage-controlled motion of transverse domain walls in cubic magnetostrictive materials under transverse magnetic field 横磁场作用下立方磁致伸缩材料横畴壁的电压控制运动

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-16 DOI: 10.1016/j.jmmm.2025.173212

Sumit Maity, Ambalika Halder, Sharad Dwivedi

{"title":"Voltage-controlled motion of transverse domain walls in cubic magnetostrictive materials under transverse magnetic field","authors":"Sumit Maity, Ambalika Halder, Sharad Dwivedi","doi":"10.1016/j.jmmm.2025.173212","DOIUrl":"10.1016/j.jmmm.2025.173212","url":null,"abstract":"<div><div>This work examines the dynamic features of Néel-type transverse domain walls within a thin cubic crystal magnetostrictive material tightly coupled with a thick piezoelectric actuator under the combined effects of transverse and axial (driving) magnetic fields, current density, voltage-generated electric field, magnetocrystalline anisotropy, magnetoelastic field and the crystal symmetry of the material. The investigation is performed within the framework of the one-dimensional Landau–Lifshitz–Gilbert equation. We introduce a trial function based on the Schryer and Walker approach and employ the small angle approximation technique to determine the explicit expression of key parameters such as domain wall profile, width, velocity, displacement, and excitation angle. Our results indicate that the transverse magnetic field significantly increases the domain wall velocity for the field-driven motion; however, it does not affect the velocity in the current-driven one. Moreover, magnetostriction, voltage-generated electric field, and cubic anisotropy provide additional control to suitably tune the domain wall width, velocity, and displacement. These factors can effectively manipulate field-driven DW mobility via DW width; however, do not alter current-driven DW one. Our findings show good qualitative agreement with recent observations.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173212"},"PeriodicalIF":2.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331467","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

Effect of Ti-Sn co-doping on the superconducting properties of RHQT Nb3Al wires Ti-Sn共掺杂对RHQT Nb3Al线超导性能的影响

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-15 DOI: 10.1016/j.jmmm.2025.173305

Yuyao Zhang , Zhou Yu , Wenlong Li , Changkun Yang , Huaihao Zhang , Jiahao Ren , Hong Peng , Wentao Wang , Xiaguang Sun , Yong Zhao

{"title":"Effect of Ti-Sn co-doping on the superconducting properties of RHQT Nb3Al wires","authors":"Yuyao Zhang , Zhou Yu , Wenlong Li , Changkun Yang , Huaihao Zhang , Jiahao Ren , Hong Peng , Wentao Wang , Xiaguang Sun , Yong Zhao","doi":"10.1016/j.jmmm.2025.173305","DOIUrl":"10.1016/j.jmmm.2025.173305","url":null,"abstract":"<div><div>Nb3Al superconducting wire co-doped with Ti and Sn elements was fabricated by rapid heating quenching, and transformation (RHQT) method. Various amounts of Ti and Sn were doped in the precursor wire, including 0.5%Ti 1% Sn, 1%Ti 1% Sn, 2%Ti 1% Sn with different Ti/Sn ratios, and 0.25% Ti 0.5% Sn, 1%Ti 2% Sn, 2% Ti 4% Sn with fixed Ti/Sn ratio. All the wires consist of Nb3Al A15 superconducting phase and have a uniform microstructure after the RHQT process. Compared to the pure sample, the Jc of Nb3Al sample doped with 0.5%Ti 1% Sn increased 52 %, reaching the maximum value of 1.1 × 105A/cm2@4.2 K, 12 T. Other two Nb3Al samples doped with 0.25% Ti 0.5 % Sn and 1% Ti 2% Sn showed Jc improvement of about 50 % at 10 K, 8 T. The chemical composition of Ti and Sn is highly uniform with the atomic ratio approximating 1:2, which might correspond to the Ti6Sn5 intermetallic compound based on the Ti-Sn phase diagram. In the Ti and Sn co-doped samples, the peak position of the normalized flux pinning force shifts to a higher normalized field, indicating the contribution of point pinning centers. Therefore, the improvement of Jc in the Ti and Sn co-doped Nb3Al samples might be attributed to the formation of nano-sized Ti6Sn5 particles in the superconducting matrix. During the rapid heating process, the Ti and Sn atoms were dissolved in the Nb(Al)ss phase, and then precipitated out during the transformation heat treatment to form nano-sized Ti6Sn5 particles in the Nb3Al phase.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173305"},"PeriodicalIF":2.5,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331466","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

The impact of the external magnetic field on D2+ ion ground state properties in a Gaussian GaAs quantum dot 外磁场对高斯GaAs量子点中D2+离子基态性质的影响

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-14 DOI: 10.1016/j.jmmm.2025.173304

Siddartha Gone , Divya Rani Gunty , Madhusudan Gorre , Narasimha Raju Chebrolu , Aalu Boda

引用次数: 0

Hubbard and strain effects on electronic, magnetic and elastic properties of FeV, Fe3V and FeV3 FeV、Fe3V和FeV3的电子、磁性和弹性的Hubbard和应变效应

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-14 DOI: 10.1016/j.jmmm.2025.173257

A. Elkhou , M. Lassri , L.B. Drissi

{"title":"Hubbard and strain effects on electronic, magnetic and elastic properties of FeV, Fe3V and FeV3","authors":"A. Elkhou , M. Lassri , L.B. Drissi","doi":"10.1016/j.jmmm.2025.173257","DOIUrl":"10.1016/j.jmmm.2025.173257","url":null,"abstract":"<div><div>In this study, we explore the electronic, elastic, and magnetic properties of <math><mi>FeV</mi></math>, <math><mrow><msub><mrow><mi>Fe</mi></mrow><mrow><mn>3</mn></mrow></msub><mi>V</mi></mrow></math> and <math><msub><mrow><mi>FeV</mi></mrow><mrow><mn>3</mn></mrow></msub></math> alloys using density functional theory (DFT) with the GGA and GGA＋U approximations. The GGA＋U method, incorporating the Hubbard correction, provides a more accurate description of magnetic interactions compared to standard GGA. Notably, the inclusion of the Hubbard U parameter enhances the metallic characteristics, particularly for the <math><msub><mrow><mi>FeV</mi></mrow><mrow><mn>3</mn></mrow></msub></math> alloy, which transitions from a non-magnetic to a magnetic metal. We also evaluate the changes in elastic properties across the compounds and examine the influence of tensile strain on the <math><mrow><mi>B</mi><mn>2</mn><mo>−</mo><mi>FeV</mi></mrow></math> phase, revealing its mechanical response. Under strain, <math><mrow><mi>B</mi><mn>2</mn><mo>−</mo><mi>FeV</mi></mrow></math> exhibits a metal-to-half-metal transition at strains of 4.9% and 5%, with 100% spin polarization. Additionally, the Curie temperature reaches 820.82 K, well above room temperature, highlighting its potential for applications in electronics and spintronics.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173257"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331465","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

Crystal structure and magnetic properties of CeFe11M (M = Mo, W) CeFe11M （M = Mo， W）的晶体结构和磁性能

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-14 DOI: 10.1016/j.jmmm.2025.173294

Akila Raja, Olena Palasyuk, Deborah Schlagel, Thomas Lograsso, Andriy Palasyuk

{"title":"Crystal structure and magnetic properties of CeFe11M (M = Mo, W)","authors":"Akila Raja, Olena Palasyuk, Deborah Schlagel, Thomas Lograsso, Andriy Palasyuk","doi":"10.1016/j.jmmm.2025.173294","DOIUrl":"10.1016/j.jmmm.2025.173294","url":null,"abstract":"<div><div>Tetragonal CeFe11Mo (struct. type ThMn12, a = 8.529(1) Å, c = 4.766(1) Å, V = 346.68(1) Å3) and novel isostructural CeFe11W (a = 8.539(1) Å, c = 4.754(1) Å, V = 346.62(1) Å3) are obtained in bulk, as homogenized single-phase arc-melted alloys. Their crystal structures are evaluated by full profile Rietveld analysis of the powder X-ray diffraction patterns which confirm that Ce occupies the 2a atomic site in both cases, whereas atomic disorder is present in the Fe-sublattice, i.e., predominantly on the dumbbell 8i site and minorly on two other sites 8j and 8f. In CeFe11Mo the third element, M, is mixed with Fe on the 8i dumbbell site and 8f atomic position, whereas in CeFe11W, M is mixed on the 8i and 8j Fe sites. In these bulk CeFe12-xMx alloys the tetragonal structure persists at lower M content, x < 1 here, in comparison to known similar alloys, with x > 1. Because of the low M content, comparably higher values of mass magnetization and Curie temperature are achieved i.e., CeFe11Mo: ϭs = 104 emu/g (14.7 µB/f.u.), Tc = 420 K and CeFe11W: ϭs = 99 emu/g (16.5 µB/f.u.), Tc = 450 K. Magnetocrystalline anisotropy is uniaxial with anisotropy fields Ha ∼ 14.5 and 16.5 kOe, respectively. Based on Curie temperature and magnetic anisotropy enhancements, using tungsten as the stabilizing dopant is more beneficial than molybdenum.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173294"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279518","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