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

Closed-Loop Analysis of Nanocomposite Magnets: Integrating Micromagnetic Simulation and Experimental Testing 纳米复合磁体的闭环分析：微磁仿真与实验测试的结合

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172553

Jing Xu, Wei Xu

{"title":"Closed-Loop Analysis of Nanocomposite Magnets: Integrating Micromagnetic Simulation and Experimental Testing","authors":"Jing Xu, Wei Xu","doi":"10.1016/j.jmmm.2024.172553","DOIUrl":"10.1016/j.jmmm.2024.172553","url":null,"abstract":"<div><div>This study presents a framework for simulation-experiment closed-loop analysis of nanocomposite magnets. Firstly, hysteresis loops of nanocomposite permanent magnets were calculated using micromagnetic simulations. Then, the experimental preparation was carried out by rapid quenching of the melt and spark plasma sintering (SPS). We analyzed the effect of different sintering temperatures on the physical phase composition and magnetic properties of the samples. Characterization results show that the samples sintered at 600 °C have the highest magnetic energy product. Using transmission electron microscopy data, the polycrystalline model was refined, and further micromagnetic simulations were performed. The close agreement between simulated and experimental data confirms the improved accuracy of our simulation model. This iterative process of experimental characterization and simulation improvement reduces the discrepancy between simulation predictions and actual sample performance. It could facilitate rapid iteration in magnet development and provide valuable insights for optimizing the preparation of nanocomposite permanent magnets.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172553"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311757","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

Achieving high-performance regeneration of grain boundary diffusion Nd-Fe-B sludge via an ultra-short process 通过超短工艺实现晶界扩散钕铁硼污泥的高性能再生

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172548

Lichao Yu , Qingmei Lu , Liying Cong , Xinyuan Yang , Weiqiang Liu , Gaihua Dong , Shulin Huang , Yuan Deng , Lijuan Meng , Youhao Liu , Xiaofei Yi , Yufeng Wu , Ming Yue

{"title":"Achieving high-performance regeneration of grain boundary diffusion Nd-Fe-B sludge via an ultra-short process","authors":"Lichao Yu , Qingmei Lu , Liying Cong , Xinyuan Yang , Weiqiang Liu , Gaihua Dong , Shulin Huang , Yuan Deng , Lijuan Meng , Youhao Liu , Xiaofei Yi , Yufeng Wu , Ming Yue","doi":"10.1016/j.jmmm.2024.172548","DOIUrl":"10.1016/j.jmmm.2024.172548","url":null,"abstract":"<div><div>The grinding sludge of grain boundary diffusion Nd-Fe-B magnet is rich in heavy rare earth and has a typical core–shell microstructure. In this work, an ultra-short process was developed to realize green, in-situ regeneration of the sludge and efficient reuse of heavy rare earth elements. The regenerated magnets showed excellent magnetic performance and good temperature stability which were fabricated after the purification of sludge, composition regulation with rare earth-rich compounds, Nd<sub>42.1</sub>Fe<sub>bal</sub>B<sub>0.79</sub>, NdH<sub>x</sub>, (PrNd)H<sub>x</sub>, and sintering. Especially, the magnet prepared by using Nd<sub>42.1</sub>Fe<sub>bal</sub>B<sub>0.79</sub> alloy had significant property recovery, where remanence and coercivity were restored to 12.8 kG, and 20.6 kOe, respectively, reaching 97.7 % and 162.5 % of the original magnet. The magnetization reversal behavior and the coercivity mechanism were analyzed to keep the nucleation mechanism, and the high coercivity stemmed from the repair and optimization of the grain boundary by introducing rare earth-rich alloys, the full utilization of heavy rare earth elements, and the core–shell microstructure rooted in the sludge as well.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172548"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322151","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

Chain-arranged Ni1-xCox micro/nano particles prepared via a magnetic field-assisted reduction for enhanced electromagnetic wave absorption 通过磁场辅助还原制备的链排列 Ni1-xCox 微/纳米粒子可增强电磁波吸收能力

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172550

Jie Jiang , Yujing Zhang , Shiqi Zheng , Chuyang Liu , Yilin Zhang , Liang Yan , Rui Liu , Fan Wu , Dong-Hyun Kim , Feng Xu

{"title":"Chain-arranged Ni1-xCox micro/nano particles prepared via a magnetic field-assisted reduction for enhanced electromagnetic wave absorption","authors":"Jie Jiang , Yujing Zhang , Shiqi Zheng , Chuyang Liu , Yilin Zhang , Liang Yan , Rui Liu , Fan Wu , Dong-Hyun Kim , Feng Xu","doi":"10.1016/j.jmmm.2024.172550","DOIUrl":"10.1016/j.jmmm.2024.172550","url":null,"abstract":"<div><div>Transition metal magnetic alloys have garnered extensive interests in electromagnetic wave absorption due to the remarkable magnetic loss capacity and unique magnetism-frequency characteristics. Herein, we report a novel magnetic absorbent of Ni<sub>1-x</sub>Co<sub>x</sub> micro chains that synthesized through a magnetic field-assisted reduction method. The precipitated Ni<sub>1-x</sub>Co<sub>x</sub> particles could be connected and aligned during the magnetic reduction process. Due to the modified electronic structure of the Co active site by Ni, the particle size in the Ni<sub>1-x</sub>Co<sub>x</sub> micro chains noticeably increases with increased x. Meanwhile, the complex dielectric constants exhibit a decreasing trend, which contributes to the improved impedance matching and higher resonance frequencies. The connected Ni<sub>1-x</sub>Co<sub>x</sub> micro/nano particles not only benefit to the conductive loss, but also strengthened the polarization loss on the contacted interfaces among the particles. As a result, significantly enhanced electromagnetic wave absorption performance was obtained with the minimum reflection loss of −21.0 dB and the effective absorption bandwidth of 3.92 GHz at a thickness of only 1.35 mm. Overall, this work has demonstrated the strategy of designing aligned bimetallic absorbent, possessing great potentials in improving their microwave absorption properties.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172550"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311750","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

Multiferrocity in spin chain based polycrystalline Sm2BaCoO5 基于自旋链的多晶 Sm2BaCoO5 的多铁性

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172545

Sanjay Kumar Upadhyay , Shivani Kulasari , Rosni Roy , Sagar Sen , Rajib Mondal

{"title":"Multiferrocity in spin chain based polycrystalline Sm2BaCoO5","authors":"Sanjay Kumar Upadhyay , Shivani Kulasari , Rosni Roy , Sagar Sen , Rajib Mondal","doi":"10.1016/j.jmmm.2024.172545","DOIUrl":"10.1016/j.jmmm.2024.172545","url":null,"abstract":"<div><div>Sm<sub>2</sub>BaCoO<sub>5</sub>, a spin chain based polycrystalline compound which crystallize in orthorhombic structure (space group, Immm), is known to order antiferromagnetically close to 38 K. As motivated by 1) its Tb analogues <span><span>[1]</span></span> which show giant magneto-dielectric coupling and a new type-II multiferroic and 2) recently discovered multiferroicity in Sm<sub>2</sub>BaMO<sub>5</sub> (M=Ni and Cu) compounds <span><span>[2]</span></span>, <span><span>[3]</span></span>, detailed dielectric, ferroelectric and magneto-electric measurements have been carried out for Sm<sub>2</sub>BaCoO<sub>5</sub>. Magnetic and heat capacity measurements confirm the antiferromagnetic ordering at around 38 K. Interestingly ferroelectric transition also occurs around 38 K as revealed by frequency independent dielectric data as well as pyro-current measurements in various protocols. Therefore, the presented experimental results show that spin chain oxide Sm<sub>2</sub>BaCoO<sub>5</sub> is new type-II multiferroic and we have identified R<sub>2</sub>BaCoO<sub>5</sub> (R=Tb, Sm)- spin chain based cobaltates, is the new multiferroic series, so far unexplored.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172545"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311753","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

Magnetorheological and magnetic actuation behaviour of solvent cast 4D printed styrene-ethylene-butylene-styrene block copolymer based magnetorheological elastomeric materials 基于苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物的溶剂浇注 4D 印刷磁流变弹性材料的磁流变和磁致动特性

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172551

Arun Kumar , Pulak Mohan Pandey , Kuldeep , Sunil Jha , G.A. Basheed , Shib Shankar Banerjee

{"title":"Magnetorheological and magnetic actuation behaviour of solvent cast 4D printed styrene-ethylene-butylene-styrene block copolymer based magnetorheological elastomeric materials","authors":"Arun Kumar , Pulak Mohan Pandey , Kuldeep , Sunil Jha , G.A. Basheed , Shib Shankar Banerjee","doi":"10.1016/j.jmmm.2024.172551","DOIUrl":"10.1016/j.jmmm.2024.172551","url":null,"abstract":"<div><div>In this work styrene-ethylene-butylene-styrene (SEBS) block copolymer based smart magnetorheological elastomeric (MREs) materials have been additively manufactured using solvent-cast 4D Printing (SC-4DP) technique. The effect of carbonyl iron powder (CIP) content on the particle distribution, particle–matrix adhesion, surface and layer morphology of the 4D Printed MRE sample was investigated. CIP particles were observed to be well embedded and dispersed up to 60 wt% content. However, at higher CIP content the tendency of the particles to agglomerate increased significantly. Furthermore, samples with CIP content ≥70 wt% showed poor particle–matrix adhesion and possessed inter-layer coalescence defects. Investigations were also performed to evaluate the magnetic properties of MREs at room temperature. Magnetorheological behaviour was studied to evaluate the effect of varying magnetic field on dynamic viscoelastic properties. Magnetorheological effect increased from ∼79 % to ∼211 % with an increase in CIP content. However, the particle–matrix adhesion also significantly affected the magnetorheological effect for higher CIP content samples. Magnetic actuation capability of flexible MRE samples was evaluated for gripper-based application. SC-4D Printed flexible grippers were able to successfully grip, lift, and drop both the soft deformable and rigid freeform profile objects in different media (air and sodium hydroxide solution) suggesting suitability for remotely actuated gripper-based applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172551"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358022","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

Pinning of domain walls in epitaxial garnet film patterned by surface arrays of ferromagnetic metal particles 铁磁性金属颗粒表面阵列图案化的外延石榴石薄膜中的畴壁钉扎现象

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172534

M.P. Temiryazeva , I.A. Kolmychek , A.G. Temiryazev , V.B. Novikov , A.I. Maydykovskiy , N.S. Gusev , E.V. Skorokhodov , S.A. Gusev , S.A. Nikitov , K.S. Napolskii , T.V. Murzina

{"title":"Pinning of domain walls in epitaxial garnet film patterned by surface arrays of ferromagnetic metal particles","authors":"M.P. Temiryazeva , I.A. Kolmychek , A.G. Temiryazev , V.B. Novikov , A.I. Maydykovskiy , N.S. Gusev , E.V. Skorokhodov , S.A. Gusev , S.A. Nikitov , K.S. Napolskii , T.V. Murzina","doi":"10.1016/j.jmmm.2024.172534","DOIUrl":"10.1016/j.jmmm.2024.172534","url":null,"abstract":"<div><div>Rare-earth iron garnet epitaxial films famous for their unique magnetic, microwave and optical properties consistently attract high interest. Domain structure of both bulk and interfaces of garnet films is closely connected with their magnetic properties and magnetization dynamics. In this work, we investigate the magnetic behaviour and domain structure of an epitaxial bismuth-substituted lutetium iron garnet film with a regular array of planar submicron particles made of Co film or Co/Pt multilayer on its surface. Optical polarization microscopy and magnetic force microscopy techniques used for the characterization of these composite structures confirm the mutual influence of the garnet and metal nanostructured layers on each other. On the one hand, dense ordered metal particles provide the pinning of the surface magnetic domains of the garnet film, which further affects the organization of the bulk stripe domains. On the other hand, we observed that the domain structure in the metallic pattern is governed by the domain structure of the garnet placed beneath it.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172534"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322152","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

Signatures of spin-liquid-like state and spin-phonon coupling in square lattice Sr2CuTe0.5W0.5O6 方晶格 Sr2CuTe0.5W0.5O6 中的类自旋液态和自旋声子耦合特征

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172549

Shalini Badola, Aprajita Joshi, Surajit Saha

{"title":"Signatures of spin-liquid-like state and spin-phonon coupling in square lattice Sr2CuTe0.5W0.5O6","authors":"Shalini Badola, Aprajita Joshi, Surajit Saha","doi":"10.1016/j.jmmm.2024.172549","DOIUrl":"10.1016/j.jmmm.2024.172549","url":null,"abstract":"<div><div>A spin-liquid state can be induced by uncompensated interactions in the spin lattice due to disorder or randomness in exchange pathways. Sr<sub>2</sub>CuTeO<sub>6</sub> and Sr<sub>2</sub>CuWO<sub>6</sub> are square-lattice antiferromagnetic double perovskites (A<sub>2</sub>BB′O<sub>6</sub>) with dominant nearest-neighbor (Néel-type) and next-nearest neighbor (Columnar-type) magnetic interactions, respectively. Random distribution of these interactions in a system has been theoretically predicted to be a way to induce the spin-liquid state. Here, we have synthesized a spin-liquid candidate Sr<sub>2</sub>CuTe<sub>0.5</sub>W<sub>0.5</sub>O<sub>6</sub> with B′-site mixing of its parent systems (Sr<sub>2</sub>CuTeO<sub>6</sub> and Sr<sub>2</sub>CuWO<sub>6</sub>) to explore the phonon properties and their correlations with the liquid-like magnetic interactions. Our measurements reveal the presence of a broad continuum in the Raman spectrum of Sr<sub>2</sub>CuTe<sub>0.5</sub>W<sub>0.5</sub>O<sub>6</sub>, instead of the well-defined spin-wave excitations (magnon) observed in the parent systems. Observation of continuum feature in the Raman spectrum in conjunction with the lack of long-range magnetic order provide the signatures of liquid-like correlations. On the other hand, phonon anomalies are observed below the short-ranged magnetic ordering temperature indicating the onset of spin-phonon coupling.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172549"},"PeriodicalIF":2.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314282","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

Trajectory tracking control of a four-bar linkage prosthetic knee with magnetorheological damper 带磁流变阻尼器的四杆联动假肢膝关节的轨迹跟踪控制

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-21 DOI: 10.1016/j.jmmm.2024.172537

Jiawei Zhang , Guoliang Hu , Jinpeng Zhao , Wencai Zhu

引用次数: 0

Development and characterization of superparamagnetic Zn-Doped Nickel ferrite nanoparticles 超顺磁性掺锌镍铁氧体纳米粒子的开发与表征

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-20 DOI: 10.1016/j.jmmm.2024.172547

Sarita , Anchal , Priya , R.K. Beniwal , M.S. Rulaniya , P.M. Saini , Pooja Yadav , Upendra Kumar , Aakansha , P.A. Alvi , B.L. Choudhary

{"title":"Development and characterization of superparamagnetic Zn-Doped Nickel ferrite nanoparticles","authors":"Sarita , Anchal , Priya , R.K. Beniwal , M.S. Rulaniya , P.M. Saini , Pooja Yadav , Upendra Kumar , Aakansha , P.A. Alvi , B.L. Choudhary","doi":"10.1016/j.jmmm.2024.172547","DOIUrl":"10.1016/j.jmmm.2024.172547","url":null,"abstract":"<div><div>The nanocrystalline Zn-doped Nickel ferrite nanoparticles, Zn<sub>x</sub>Ni<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> (x = 0.2, 0.4, 0.6 and 0.8) have been developed using the sol–gel method. The average crystallite size was calculated using the Debye- Scherrer formula through X-ray diffractometry and found to be in the range of ∼ 4 nm to 7 nm. Rietveld refinement of the prepared samples suggested the cubic spinel phase of the nanoparticles. For the surface morphology analysis of the nanoparticles, the Field Emission Scanning Electron Microscope (FESEM) technique was utilized, which showed the spherical shape of the particles. Elemental Dispersive X-ray spectroscopy (EDAX) ascertained the experimentally obtained elemental composition with the calculated elemental composition and identified the elements present within the sample. Fourier Transform Infrared Spectroscopy (FTIR) revealed the two prominent absorbing bands, i.e., tetrahedral complex, υ<sup>1</sup> and octahedral complex, υ<sup>2</sup> in the range of 4000–300 cm<sup>−1</sup>. Photoluminescence spectroscopy and UV Visible diffuse reflectance spectroscopy determined the optical properties of the samples and it was observed that with the increasing concentration of Zinc, the value of band gap decreased from 2.29 eV to 2.11 eV. The M−H curves of the Zn-doped nickel ferrites exhibit superparamagnetic behavior at room temperature, confirming the presence of a single domain in the sample.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"610 ","pages":"Article 172547"},"PeriodicalIF":2.5,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311751","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

What will be the Euclidean dimension of an Ising ferromagnetic cubic shell? 伊辛铁磁立方壳的欧几里得维度是多少？

IF 2.5 3区材料科学

Journal of Magnetism and Magnetic Materials Pub Date : 2024-09-20 DOI: 10.1016/j.jmmm.2024.172539

Ishita Tikader, Muktish Acharyya

引用次数: 0