GMR and micro-structure in bulk AuCo nanogranular alloys
GMR and micro-structure in bulk AuCo nanogranular alloys
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块状 AuCo 纳米颗粒合金的 GMR 和微观结构
DOI：
10.1016/0304-8853(94)00724-1
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发表时间：
1995
影响因子：
2.7
通讯作者：
T. Goto
中科院分区：
文献类型：
--
作者：
N. Kataoka;H. Takeda;J. Echigoya;K. Fukamichi;E. Aoyagi;Y. Shimada;H. Okuda;K. Osamura;M. Furusaka;T. Goto
研究了由水淬和随后的时效工艺制备的Au Co块体纳米颗粒合金的巨磁电阻（GMR）与显微结构的关系。在老化后观察到GMR。特别是在250°C时效100 h的Au_（85）Co_（15）多层膜中，室温下的磁电阻（MR）比为12%，大于Co Au多层膜中的MR比。Co沉淀物呈盘状，长约20 nm，厚约0.6 nm，透射电镜观察其MR曲线形状。
The relation between giant magnetoresistance (GMR) and microstructure has been investigated for AuCo bulk nanogranular alloys prepared by water-quenching and subsequent aging. The GMR has been observed after aging. In particular, 12% of the magnetoresistance (MR) ratio is achieved at room temperature in the Au85Co15aged at 250°C for 100 h, which is larger than the ratio in Co Au multilayers. TheCo precipitates confirmed to be of disk-shape with 20 nm long and 0.6 nm thick with the shape of MR curve affected by TEM.