Tuned bi-anisotropy of Y2Co14B nanocrystalline magnetic alloys toward high-frequency applications

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-02-01 DOI:10.1007/s12598-024-03104-x

Ling-Feng Wang, Ke-Bing Wang, Qi-Ming Chen, Chen Wu, Xin-Hua Wang, Mi Yan

{"title":"Tuned bi-anisotropy of Y2Co14B nanocrystalline magnetic alloys toward high-frequency applications","authors":"Ling-Feng Wang, Ke-Bing Wang, Qi-Ming Chen, Chen Wu, Xin-Hua Wang, Mi Yan","doi":"10.1007/s12598-024-03104-x","DOIUrl":null,"url":null,"abstract":"<div><p>The prevalence of wide-bandgap semiconductors urges the development of advanced soft magnetic materials for high-frequency applications. While soft magnetic alloys are limited by resonances at elevated frequencies, the incorporation of planar anisotropy serves as an effective strategy to overcome this dilemma and extend their potential for high-frequency applications. Herein, nanocrystalline Y<sub>2</sub>Co<sub>14</sub>B alloys have been designed with tuned magnetocrystalline and shape bi-anisotropy via melt spinning and magnetic field-assisted annealing. With the application of zero, transverse, rotational and longitudinal magnetic fields (denoted as ZFA, TFA, RFA and LFA), the effects of field direction and annealing time on microstructural and performance evolution have been investigated. Compared with ZFA, magnetic field-assisted annealing not only promotes the growth of nanograins but also alters the coincidence degree between intrinsic easy-plane (IEP) and artificial easy-plane (AEP) structures. While the random distribution of IEP structure is achieved for the RFA due to the formation of non-orientated nanograins, directional magnetic field-assisted annealing contributes to preferentially orientated (006) nanograins, especially for the LFA, resulting in optimal coincidence between the magnetocrystalline anisotropy and shape anisotropy. Such enhancement facilitates the transformation of magnetic domain structures into in-plane configurations with strip-like features. Consequently, a large ratio between the out-of-plane and in-plane anisotropy (<i>H</i><sub>out</sub>/<i>H</i><sub>in</sub>) and improved softness of the alloy can be achieved, providing valuable references for future fabrication of rare-earth (R) transition-metal (T) alloys with superior easy-plane characteristics.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 2","pages":"1243 - 1255"},"PeriodicalIF":9.6000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12598-024-03104-x","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The prevalence of wide-bandgap semiconductors urges the development of advanced soft magnetic materials for high-frequency applications. While soft magnetic alloys are limited by resonances at elevated frequencies, the incorporation of planar anisotropy serves as an effective strategy to overcome this dilemma and extend their potential for high-frequency applications. Herein, nanocrystalline Y₂Co₁₄B alloys have been designed with tuned magnetocrystalline and shape bi-anisotropy via melt spinning and magnetic field-assisted annealing. With the application of zero, transverse, rotational and longitudinal magnetic fields (denoted as ZFA, TFA, RFA and LFA), the effects of field direction and annealing time on microstructural and performance evolution have been investigated. Compared with ZFA, magnetic field-assisted annealing not only promotes the growth of nanograins but also alters the coincidence degree between intrinsic easy-plane (IEP) and artificial easy-plane (AEP) structures. While the random distribution of IEP structure is achieved for the RFA due to the formation of non-orientated nanograins, directional magnetic field-assisted annealing contributes to preferentially orientated (006) nanograins, especially for the LFA, resulting in optimal coincidence between the magnetocrystalline anisotropy and shape anisotropy. Such enhancement facilitates the transformation of magnetic domain structures into in-plane configurations with strip-like features. Consequently, a large ratio between the out-of-plane and in-plane anisotropy (H_out/H_in) and improved softness of the alloy can be achieved, providing valuable references for future fabrication of rare-earth (R) transition-metal (T) alloys with superior easy-plane characteristics.

Graphical abstract

查看原文本刊更多论文

面向高频应用的Y2Co14B纳米晶磁性合金的双各向异性调谐

宽频带隙半导体的普及推动了用于高频应用的先进软磁材料的发展。虽然软磁合金受到高频共振的限制，但结合平面各向异性是克服这一困境并扩大其高频应用潜力的有效策略。本文通过熔体纺丝和磁场辅助退火，设计了具有可调谐磁晶和形状双各向异性的纳米晶Y2Co14B合金。采用零磁场、横向磁场、旋转磁场和纵向磁场（分别表示为ZFA、TFA、RFA和LFA），研究了磁场方向和退火时间对合金微观组织和性能演变的影响。与ZFA相比，磁场辅助退火不仅促进了纳米颗粒的生长，而且改变了本构易平面（IEP）和人工易平面（AEP）结构的契合度。由于非取向纳米晶粒的形成，RFA实现了IEP结构的随机分布，而定向磁场辅助退火有助于（006）纳米晶粒的优先取向，特别是对于LFA，导致磁晶各向异性和形状各向异性之间的最佳吻合。这种增强有利于磁畴结构转变为具有条状特征的面内结构。从而获得了较大的面外和面内各向异性（Hout/Hin）比，提高了合金的柔软度，为今后制备具有优越易平面特性的稀土过渡金属(T)合金提供了有价值的参考。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.