Synthesis of Magnetic Granular Materials with GMR and Soft Magnetic Properties by Cluster Deposition Technique

团簇沉积技术合成具有巨磁阻和软磁性能的磁性颗粒材料

• 批准号: 11650004
• 负责人: ISHII Kiyoshi
• 金额: $ 2.37万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650004/
• 关键词: Granular material; Magnetic film; Cluster deposition; Sputtered film; Gas now sputtering; 軟磁性; 磁気相互作用; クラスター堆積法; スパッタ法

A new method to prepare magnetic granular materials has been developed in this hdy. In .I the method manometer-sized clusters of ferromagnetic metal are mixed with a different metal vapor, and the mixture is deposited on the substrate. It is expected to allow the independent control of the size and density of the magnetic particles in the granular film. The magnetic properties and giant magnetoresistance (GMR) were investigated for Fe/Ag and Co/Ag films prepared by this method. The results are summarized as follows.1. Fe and Co clusters with the mean diameter of about 5 nm were well dispersed in Ag matrix.2. Interparticle magnetic interaction became strong with increasing the particle density in Fe/Ag system.3. The coercive force was 5 Oe for the Fe/Ag film with Fe content of 35 at%. Moreover, the film had GMR ratio of 10 % at room temperature.4. For the first time, magnetic behavior described by a Curie-Weiss-like law was observed for manometer particle system, and ferromagnetic ordering at room temperature was observed to take place at the Fe content of 35 at% for Fe/Ag films.

本课题组开发了一种制备磁性颗粒材料的新方法。在该方法中，压力计大小的铁磁金属簇与不同的金属蒸气混合，并将该混合物沉积在基底上。预计可以独立控制颗粒膜中磁性颗粒的尺寸和密度。研究了该方法制备的Fe/Ag和Co/Ag薄膜的磁性能和巨磁阻(GMR)。研究结果如下： 1．平均直径约为5 nm的Fe、Co团簇在Ag基体中分散良好。 2． Fe/Ag体系中颗粒间的磁相互作用随着颗粒密度的增加而增强。3． Fe含量为35at%的Fe/Ag薄膜的矫顽力为5Oe。此外，薄膜在室温下的GMR比为10％。4．首次在压力计颗粒系统中观察到类居里-韦斯定律描述的磁性行为，并且观察到 Fe/Ag 薄膜在 Fe 含量为 35 at% 时发生室温铁磁有序化。

项目成果

K.Ishii: "Formation of Iron Oxide Films by Gas-Flow-Sputtering"Proc.of 8^ International Conference on Ferrites. (印刷中). (2000)

K. Ishii：“通过气流溅射形成氧化铁薄膜”，第 8 届国际铁氧体会议论文集（2000 年）。

H,Hamakake: "Effects of Substrate temperature on the Structure of Fe/Ag Granular Films Prepared by Cluster Deposition"Proc.2nd Magneto-Electronics Inter.Symp. 419-422 (1999)

H，Hamakake：“基材温度对簇沉积制备的 Fe/Ag 颗粒薄膜结构的影响”Proc.2nd Magneto-Electronics Inter.Symp。

K.Ishii: "Gas-Flow-Sputtering for Vapor Deposition and Cluster Deposition"Proc.of 43^ SVC Annual Technical Conference. 107-112 (2000)

K.Ishii：“气相沉积和簇沉积的气流溅射”Proc.of 43^<rd> SVC 年度技术会议。

石井清: "ガスフロースパッタ法とグラニュラー磁性体の合成"日本応用磁気学会誌. 24・11. 1343-1348 (2000)

石井清：“气流溅射法和颗粒磁性材料的合成”日本应用磁学学会杂志24・11（2000）。

K.Ishii: "Formation of Iron Oxide Films by Gas-Flow-Sputtering"Proc.of 8^ International Conference on Ferrites. 693-695 (2000)

K.Ishii：“通过气流溅射形成氧化铁薄膜”Proc.of 8^<th>国际铁氧体会议。