磁性体金属Ｃｏ－窒化物多層薄膜の作製と軟磁気特性

磁性金属钴氮化物多层薄膜的制备及软磁性能

• 批准号: 15J03637
• 负责人: 曹 洋
• 金额: $ 1.09万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2015
• 资助国家: 日本
• 起止时间: 2015-04-24 至 2017-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15J03637/
• 关键词: granular nanostructure; high frequency response; magneto-dielectric; Co-HfN; Co-AlF; Nanogranular films; High-frequency device; Magneto-dielectricity

Through insertion of HfN interlayer into CoHfN structure, I realized the transition between soft magnetic properties and PMA, and attributed this transition to the suppression of columnar cluster and reduced interlayer interaction. This unique CoHfN/HfN multilayer granular structure is insightful to understand this growth-induced PMA films with tunable gigahertz frequency from 0.9 to 2 GHz by engineering the thicknesses of both granular and interlayer.The 2D Co/AlF granular films has been prepared. The structure of Co/AlF film consists of Co granule and AlF matrix. The existence of ferromagnetic clusters in Co(3nm)/AlF(5nm) films greatly improve the low-field sensitivity of TMD, displaying high 0.8% at H = 1 kOe,a value of 8-fold enhancement compared with the FeCo-MgF granular films.

通过在CoHfN结构中插入HFN中间层，实现了软磁性能与PMA的转变，并将这种转变归因于柱状团簇的抑制和层间相互作用的减弱。这种独特的CoHfN/HFN多层颗粒状结构可以通过控制颗粒层和过渡层的厚度来理解这种生长诱导的PMA薄膜，其频率从0.9 GHz到2 GHz可调。Co/AlF薄膜的结构由Co颗粒和AlF基质组成。Co(3 Nm)/AlF(5 Nm)薄膜中铁磁性团簇的存在极大地提高了TMD的低场灵敏度，在H=1 Koe处表现出较高的0.8%，是FeCo-MGF颗粒膜的8倍。

项目成果

Granule Content Dependence on Tunneling Magneto-Dielectric Responses in Co-MgF2 Nanogranular Films

Co-MgF2 纳米颗粒薄膜中颗粒含量对隧道磁电介质响应的依赖性

• 发表时间: 2017
• 作者: 曹 洋;梅津 輝;小林 伸聖;張 亦文;増本 博
• 通讯作者: 増本 博

Structure and Isotropic High-Frequency Response of Co-HfN Nanogranular Films

• DOI: 10.1109/tmag.2015.2438003
• 发表时间: 2015-06
• 期刊: IEEE Transactions on Magnetics
• 影响因子: 2.1
• 作者: Yang Cao;Yiwen Zhang;S. Ohnuma;N. Kobayashi;H. Masumoto

Structure and magneto-dielectric effects of Co/AlF granular film

Co/AlF颗粒薄膜的结构和磁介电效应

• 发表时间: 2016
• 作者: Yang Cao;Nobukiyo Kobayashi;Shigehiro Ohnuma;and Hiroshi Masumoto
• 通讯作者: and Hiroshi Masumoto

Tunneling-magneto-dielectric effect with high low-field sensitivity in Co/AlF granular multilayers

Co/AlF 颗粒多层膜中具有高低场灵敏度的隧道磁介电效应

• 发表时间: 2016
• 作者: Yang Cao;Nobukiyo Kobayashi;Yiwen Zhang;Shigehiro Ohnuma and Hiroshi Masumoto
• 通讯作者: Shigehiro Ohnuma and Hiroshi Masumoto

Control of the static and high-frequency magnetic properties in perpendicular anisotropic CoHfN granular films through insertion of HfN interlayers

通过插入 HfN 夹层控制垂直各向异性 CoHfN 颗粒薄膜的静态和高频磁性能

• 发表时间: 2017
• 期刊: Japanese Journal of Applied Physics
• 影响因子: 1.5
• 作者: Y. Cao;Y. Zhang;S. Ohnuma;N. Kobayashi;and H. Masumoto
• 通讯作者: and H. Masumoto