Journal of Magnetism and Magnetic Materials最新文献

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Study of magnetic, thermodynamic, and transport properties in orthorhombic GdNiAl3 正交GdNiAl3的磁性、热力学和输运性质研究
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173319
S. Nallamuthu , K. Arun , A.R. Vimaljith , Sergej Ilkovic , Ivan Curlik , Marian Reiffers , R. Nagalakshmi
{"title":"Study of magnetic, thermodynamic, and transport properties in orthorhombic GdNiAl3","authors":"S. Nallamuthu ,&nbsp;K. Arun ,&nbsp;A.R. Vimaljith ,&nbsp;Sergej Ilkovic ,&nbsp;Ivan Curlik ,&nbsp;Marian Reiffers ,&nbsp;R. Nagalakshmi","doi":"10.1016/j.jmmm.2025.173319","DOIUrl":"10.1016/j.jmmm.2025.173319","url":null,"abstract":"<div><div>The compound GdNiAl<sub>3</sub> crystallizes in an orthorhombic structure with the space group Pnma. Magnetization and heat capacity measurements reveal the presence of multiple magnetic transitions below the ordering temperature T<sub>ord</sub> = 72.5 K, suggesting the existence of competing magnetic interactions within the system. This behavior is likely associated with the structural complexity of GdNiAl<sub>3</sub>, which features randomly oriented Ni-centered tricapped trigonal prisms, further coordinated by additional aluminum atoms. Additionally, a ferromagnetic transition observed at 165.5 K is attributed to the presence of a GdAl<sub>2</sub> impurity phase.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173319"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471056","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
Broadband tunable YIG film resonator with high loaded-Q and spurious mode suppression 宽带可调谐YIG薄膜谐振器,具有高负载q和杂散模式抑制
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173289
Xinan Fan , Qinghui Yang , Yuanjing Zhang , Feng Wang , Shanshan Du , Lingtong Liu , Ming Wang , Huaiwu Zhang
{"title":"Broadband tunable YIG film resonator with high loaded-Q and spurious mode suppression","authors":"Xinan Fan ,&nbsp;Qinghui Yang ,&nbsp;Yuanjing Zhang ,&nbsp;Feng Wang ,&nbsp;Shanshan Du ,&nbsp;Lingtong Liu ,&nbsp;Ming Wang ,&nbsp;Huaiwu Zhang","doi":"10.1016/j.jmmm.2025.173289","DOIUrl":"10.1016/j.jmmm.2025.173289","url":null,"abstract":"<div><div>In this work, a broadband tunable high load factor (<span><math><msub><mrow><mi>Q</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span>) resonator based on yttrium iron garnet (YIG) films is proposed. Single-crystal YIG wafers were prepared on [111] crystal-oriented GGG substrates by liquid phase epitaxy (LPE) technique, and the samples were thinned to 100 um by chemical–mechanical polishing process to obtain excellent crystal quality with magnetic resonance linewidths as low as 1.8 <span><math><mrow><mi>O</mi><mi>e</mi></mrow></math></span>. The resonator structure consists of an alumina ceramic substrate, a coplanar waveguide (CPW), and an open resonance ring (SRR). The CPW is used to excite magnetic resonance in the YIG film, and placing the YIG film on the backside of the CPW effectively enhances the uniformity of the microwave field, while the SRR structure further improves the uniformity of the magnetic field distribution. Experimental results demonstrate that the resonator exhibits excellent performance in the 5–25 GHz tuning range, with <span><math><msub><mrow><mi>S</mi></mrow><mrow><mn>11</mn></mrow></msub></math></span> parameters better than −5.2 dB, <span><math><msub><mrow><mi>Q</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span> values above 700 and the maximum figure of merit (FOM) is 17.21 at 14 GHz. In addition, the resonator successfully suppresses the higher-order spurious modes and maintains good spectral characteristics, which is promising for the application in the field of ultra-wideband tunable devices and microwave systems.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173289"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523377","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
Enhancing the Tb utilization efficiency and coercivity in high Ce content Nd-Fe-B magnets by Pr-Tb-Zn grain boundary diffusion 利用Pr-Tb-Zn晶界扩散提高高Ce Nd-Fe-B磁体的Tb利用效率和矫顽力
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173316
Zhibin Li , Wenbing Fan , Rongshun Lai, Haibo Xu, Xiaoxuan Zheng, Xin Wang, Qianji Wang, Bo Jiang, Xianglong Zhou, Qiang Ma
{"title":"Enhancing the Tb utilization efficiency and coercivity in high Ce content Nd-Fe-B magnets by Pr-Tb-Zn grain boundary diffusion","authors":"Zhibin Li ,&nbsp;Wenbing Fan ,&nbsp;Rongshun Lai,&nbsp;Haibo Xu,&nbsp;Xiaoxuan Zheng,&nbsp;Xin Wang,&nbsp;Qianji Wang,&nbsp;Bo Jiang,&nbsp;Xianglong Zhou,&nbsp;Qiang Ma","doi":"10.1016/j.jmmm.2025.173316","DOIUrl":"10.1016/j.jmmm.2025.173316","url":null,"abstract":"<div><div>Grain boundary diffusion is an effective method for improving the coercivity of Nd-Fe-B sintered magnets. However, the coercivity is not significantly enhanced after grain boundary diffusion in magnets with high Ce content due to the presence of the REFe<sub>2</sub> phase. In this study, we have designed a novel low-melting-point ternary diffusion source of Pr<sub>53</sub>Tb<sub>42</sub>Zn<sub>5</sub> that can effectively improve the diffusion efficiency and utilization of Tb, thereby significantly enhancing the coercivity of the magnets. After diffusion of Tb and Pr<sub>53</sub>Tb<sub>42</sub>Zn<sub>5</sub> in sintered magnets with 25.8 wt% Ce substituted, the coercivity of the magnets was enhanced from 1019.7 kA/m to 1412.9 and 1500.5 kA/m, respectively. Observations of the microstructure and element distribution showed that after diffusion of Tb and Pr<sub>53</sub>Tb<sub>42</sub>Zn<sub>5</sub>, Tb penetrated the surface of the RE<sub>2</sub>Fe<sub>14</sub>B main phase grains and formed a Tb-rich shell, which significantly increased its anisotropy field. Compared to the Tb diffused magnets, the Pr<sub>53</sub>Tb<sub>42</sub>Zn<sub>5</sub> diffused magnets exhibited a more uniform distribution of the Tb-rich shell and a deeper diffusion depth. Additionally, transmission electron microscopy analysis indicated that in the Tb diffused magnets, some Tb elements were consumed by the REFe<sub>2</sub> phase, whereas in the Pr<sub>53</sub>Tb<sub>42</sub>Zn<sub>5</sub> diffused magnets, there was almost no Tb in the REFe<sub>2</sub> phase, which improved the utilization of Tb and resulted in a higher increment in coercivity.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173316"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479947","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 Mn substitution on first order antiferromagnetic–ferromagnetic phase transition and magnetocaloric effect in FeRh Mn取代对FeRh中一级反铁磁-铁磁相变及磁热效应的影响
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173217
Rajeev Joshi , Pramod R. Nadig , Satish Yadav , Suman Karmakar , R. Rawat
{"title":"Effect of Mn substitution on first order antiferromagnetic–ferromagnetic phase transition and magnetocaloric effect in FeRh","authors":"Rajeev Joshi ,&nbsp;Pramod R. Nadig ,&nbsp;Satish Yadav ,&nbsp;Suman Karmakar ,&nbsp;R. Rawat","doi":"10.1016/j.jmmm.2025.173217","DOIUrl":"10.1016/j.jmmm.2025.173217","url":null,"abstract":"<div><div>Influence of Mn substitution on the first order antiferromagnetic (AF) to ferromagnetic (FM) transition and magnetocaloric effect (MCE) in FeRh has been investigated. It shows that 1.2% Mn substitution for Fe in Fe<sub>49</sub>Rh<sub>51</sub> decreases transition temperature to around 285 K. Though a majority of sample volume transforms with a hysteresis of <span><math><mo>≈</mo></math></span>10 K, a narrow hysteresis remains over a wide temperature (<span><math><mo>&gt;</mo></math></span> <span><math><mrow><mn>150</mn></mrow></math></span> K) and field (<span><math><mo>&gt;</mo></math></span> <span><math><mrow><mn>90</mn></mrow></math></span> kOe) range. The values of isothermal change in entropy (<span><math><mi>Δ</mi></math></span>S<span><math><msub><mrow></mrow><mrow><mi>t</mi><mi>h</mi></mrow></msub></math></span>) and adiabatic change in temperature (<span><math><mi>Δ</mi></math></span>T<span><math><msub><mrow></mrow><mrow><mi>a</mi><mi>d</mi></mrow></msub></math></span>) were found to be 14 J/kg-K and -7 K, respectively for 50 kOe magnetic field change which are comparable to the maximum values observed in FeRh system.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173217"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490464","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
Magnetoelectric effect behavior in layered perovskite-type of (1-x) BaTiO3–X MgFe2O4 composites 层状钙钛矿型(1-x) BaTiO3-X MgFe2O4复合材料的磁电效应行为
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173317
Padmapriya Durairaj , M.T. Rahul , Kalarikkal Nandhakumar , Muneeswaran Muniyandi , N.V. Giridharan
{"title":"Magnetoelectric effect behavior in layered perovskite-type of (1-x) BaTiO3–X MgFe2O4 composites","authors":"Padmapriya Durairaj ,&nbsp;M.T. Rahul ,&nbsp;Kalarikkal Nandhakumar ,&nbsp;Muneeswaran Muniyandi ,&nbsp;N.V. Giridharan","doi":"10.1016/j.jmmm.2025.173317","DOIUrl":"10.1016/j.jmmm.2025.173317","url":null,"abstract":"<div><div>The room temperature multiferroic behavior of (1-x)BaTiO<sub>3</sub>- xMgFe<sub>2</sub>O<sub>4</sub> (x = 0.05, 0.15, 0.25, 0.35 and 0.45) 0–3 particulate and 2–2 laminated composites has been investigated. Powder X-Ray diffraction data confirms the formation of both perovskite tetragonal BTO and spinel cubic MFO phases coexist with the absence of impurity phases in the detectable limit. The SEM image of the composite samples provides an evidence for presence of two different phases (ferroelectric BTO and ferrite MFO) with different grain size and morphology. An enhancement of magnetization with the increase of ferrite molar fraction in the particulate composites reveals the unbalanced anti parallel spins between Fe<sup>3+</sup> and Mg<sup>2+</sup> ions attributes the magnetic property of the composites. Leakage, dielectric and ferroelectric properties of the particulate composites clearly shows leaky behavior of composites with the increase of MgFe<sub>2</sub>O<sub>4</sub> concentration. Eventually, 0.65BaTiO<sub>3</sub>–0.35MgFe<sub>2</sub>O<sub>4</sub> laminated composite with sandwich structure showed better ME coupling than 2–2 laminated bilayer and 0–3 particulate ceramic composites.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173317"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501211","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
Structural, optical, and magnetic characterization of Ni-doped ZnSe nanoparticles ni掺杂ZnSe纳米粒子的结构、光学和磁性表征
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173318
P. Kannappan , Naveenkumar K.R. , Kriti , Asokan Kandasami , R. Dhanasekaran
{"title":"Structural, optical, and magnetic characterization of Ni-doped ZnSe nanoparticles","authors":"P. Kannappan ,&nbsp;Naveenkumar K.R. ,&nbsp;Kriti ,&nbsp;Asokan Kandasami ,&nbsp;R. Dhanasekaran","doi":"10.1016/j.jmmm.2025.173318","DOIUrl":"10.1016/j.jmmm.2025.173318","url":null,"abstract":"<div><div>Structural, optical, and magnetic characterizations of ZnSe and Ni-doped ZnSe nanoparticles prepared by the hydrothermal route are investigated. The powder X-ray diffraction (XRD) analysis reveals the cubic zinc blende structure. The surface morphology shows a spherical shape with an agglomerated structure. The optical absorption cutoff wavelength is ∼ 445 nm, and this absorption increases with Ni doping. The fluorescence study reveals the emission peaks at 468, 590, and 645 nm. The fluorescence study reveals the defect-level emissions and the near-band-edge emission. The vibrating sample magnetometer (VSM) study shows that pure and Ni-doped ZnSe nanoparticles exhibit room temperature ferromagnetism (RTFM) due to the presence of intrinsic defects in the synthesized samples. These defects induce a magnetic moment, which leads to ferromagnetism. A brief discussion on the mechanism for the origin of RTFM is also presented based on the above results. The pure and Ni-doped ZnSe nanoparticles with tuned magnetic properties are promising materials for spintronics applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173318"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501210","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
Investigation of magnetocaloric properties and critical phenomenon of the intermetallic compound DyCoAl across magnetic transition 金属间化合物DyCoAl的磁热特性及跨磁跃迁临界现象研究
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-23 DOI: 10.1016/j.jmmm.2025.173290
Mily Kundu, Sourav Sarkar, Kalyan Mandal
{"title":"Investigation of magnetocaloric properties and critical phenomenon of the intermetallic compound DyCoAl across magnetic transition","authors":"Mily Kundu,&nbsp;Sourav Sarkar,&nbsp;Kalyan Mandal","doi":"10.1016/j.jmmm.2025.173290","DOIUrl":"10.1016/j.jmmm.2025.173290","url":null,"abstract":"<div><div>Herein we report the magnetocaloric properties, critical analysis across magnetic phase transition and investigated their correlation for the ternary intermetallic compound DyCoAl that belongs to MgZn<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-type structure with space group <em>P6</em><span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span><em>/mmc</em>. The nature of magnetic phase transition is investigated by conducting critical analysis in the vicinity of ferromagnetic-paramagnetic transition temperature (<span><math><mrow><mo>∼</mo><mn>37</mn></mrow></math></span> K) by means of modified Arrot plot, Kouvel-Fisher plot, critical isotherm, heat capacity data analysis as well as magnetocaloric study. We acquire the critical exponents <span><math><mrow><mi>α</mi><mo>∼</mo><mn>0</mn><mo>.</mo><mn>81</mn></mrow></math></span>, <span><math><mrow><mi>β</mi><mo>∼</mo><mn>0</mn><mo>.</mo><mn>20</mn></mrow></math></span>, <span><math><mrow><mi>γ</mi><mo>∼</mo><mn>0</mn><mo>.</mo><mn>77</mn></mrow></math></span>, <span><math><mrow><mi>δ</mi><mo>∼</mo><mn>4</mn><mo>.</mo><mn>8</mn></mrow></math></span>, <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>∼</mo><mn>39</mn></mrow></math></span> K, validating their self-consistency and reliability through the Widom scaling law and scaling equations. The compound exhibits a very high relative cooling power (RCP) of <span><math><mrow><mo>∼</mo><mn>1319</mn></mrow></math></span> J/kg and a moderate adiabatic temperature change of <span><math><mrow><mo>∼</mo><mn>6</mn><mo>.</mo><mn>7</mn></mrow></math></span> K for a field change of 90 kOe. The mechanical efficiency of this compound is significantly larger compared to other refrigerants operating in cryogenic temperature range, positioning it as a promising candidate for various technological applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173290"},"PeriodicalIF":2.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490465","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
Investigating the influence of magnetization intensity on magnetoelectric coupling in MnxZn1-xFe2O4-PbZr0.5Ti0.5O3 multiferroic liquids 研究磁化强度对MnxZn1-xFe2O4-PbZr0.5Ti0.5O3多铁质液体磁电耦合的影响
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-21 DOI: 10.1016/j.jmmm.2025.173309
Haowen Mu , Shubao Yang , Weihao Wu , Hong Ao , Gang Meng , Rongli Gao , Xiaoling Deng , Wei Cai
{"title":"Investigating the influence of magnetization intensity on magnetoelectric coupling in MnxZn1-xFe2O4-PbZr0.5Ti0.5O3 multiferroic liquids","authors":"Haowen Mu ,&nbsp;Shubao Yang ,&nbsp;Weihao Wu ,&nbsp;Hong Ao ,&nbsp;Gang Meng ,&nbsp;Rongli Gao ,&nbsp;Xiaoling Deng ,&nbsp;Wei Cai","doi":"10.1016/j.jmmm.2025.173309","DOIUrl":"10.1016/j.jmmm.2025.173309","url":null,"abstract":"<div><div>The optoelectronic detectors made of multiferroic materials provide more possibilities for clinical diagnosis. In this study, Mn<em><sub>x</sub></em>Zn<sub>1</sub><em><sub>-x</sub></em>Fe<sub>2</sub>O<sub>4</sub> (<em>x</em> = 0, 0.25, 0.5, 0.75, 1) magnetic nanoparticles were prepared using a solid-phase method, to investigate how the magnetization effect the magnetoelectric coupling effect, Mn<em><sub>x</sub></em>Zn<sub>1</sub><em><sub>-x</sub></em>Fe<sub>2</sub>O<sub>4</sub>-PbZr<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>3</sub> multiferroic fluids were obtained by ball milling. Results show that as the concentration of Mn<sup>2+</sup> ions (<em>x</em>) increases, the magnetization strength gradually increases, reaching a maximum saturation magnetization of 81.83 emu/g when <em>x</em> = 1. Additionally, the dielectric constant of the Mn<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>-PZT (<em>x</em> = 0.5) multiferroic fluids reaches a maximum value of 4.67. Under the application of an external magnetic field, the dielectric constant variation rate reaches a maximum of 78.43 % when <em>x</em> = 0.75. Ferroelectric performance studies show that when <em>x</em> = 0.75, the remnant polarization strength is 8.11 nC/cm<sup>2</sup>, and the saturation polarization strength is 15.84 nC/cm<sup>2</sup>. After applying a magnetic field, the remnant polarization strength variation rate reaches a maximum of 56.12 % at <em>x</em> = 0.5, yielding a coupling coefficient of 11.49 V/(cm∙Oe), demonstrating excellent magnetoelectric coupling performance. This study reveals the significant impact of magnetization strength on the performance of magnetoelectric composite multiferroic fluids, providing insights for further optimization of the magnetoelectric coupling coefficient.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173309"},"PeriodicalIF":2.5,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338345","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
Comparison of pinning potentials, depinning currents and scalability for domain wall-based synapses with various pinning structures 不同钉钉结构的区壁突触钉钉电位、脱钉电流及可扩展性之比较
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-21 DOI: 10.1016/j.jmmm.2025.173280
Guntas Kaur, Tanmoy Pramanik
{"title":"Comparison of pinning potentials, depinning currents and scalability for domain wall-based synapses with various pinning structures","authors":"Guntas Kaur,&nbsp;Tanmoy Pramanik","doi":"10.1016/j.jmmm.2025.173280","DOIUrl":"10.1016/j.jmmm.2025.173280","url":null,"abstract":"<div><div>Domain wall (DW) based magnetic tunnel junctions (MTJ) are one of the promising candidates for memristive artificial synapses. Various domain wall tracks have recently been studied, and different geometric configurations for pinning domain walls have been proposed. Geometric pinning helps to control the domain wall (DW) motion along the track and quantizes the conductance of the DW-MTJ to specific values. This work compares various geometric pinning options in terms of thermal stability, depinning currents, and programming reliability under random thermal fluctuations for scaled device dimensions. Results show that all pinning configurations can meet the thermal stability limits required for non-volatile operation if the device is designed appropriately. However, depending on the pinning geometry, depinning current requirements can vary considerably. Reliable programming with good linearity can be achieved for all of the studied configurations. Additionally, one-dimensional pinning potentials suitable for a compact model of DW motion are obtained for each pinning geometry. The results could provide valuable guidelines for designing DW tracks with scaled dimensions, thermally stable quantized conductance states, and highly reliable programming behavior.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"629 ","pages":"Article 173280"},"PeriodicalIF":2.5,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471054","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
Polarized neutron measurements of the internal magnetization of a ferrimagnet across its compensation temperature 铁磁体在补偿温度范围内内部磁化强度的极化中子测量
IF 2.5 3区 材料科学
Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-21 DOI: 10.1016/j.jmmm.2025.173273
C.D. Hughes , K.N. Lopez , T. Mulkey , B. Hill , J.C. Long , M. Sarsour , M. Van Meter , S. Samiei , D.V. Baxter , W.M. Snow , L.M. Lommel , M. Luxnat , Y. Zhang , C. Jiang , E. Stringfellow , P. Zolnierczuk , M. Frost , M. Odom
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