GMR and micro-structure in bulk AuCo nanogranular alloys

The relation between giant magnetoresistance (GMR) and microstructure has been investigated for AuCo 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 temperatu...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1995-02, Vol.140, p.621-622
Main Authors: Kataoka, N., Takeda, H., Echigoya, J., Fukamichi, K., Aoyagi, E., Shimada, Y., Okuda, H., Osamura, K., Furusaka, M., Goto, T.
Format: Article
Language:English
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Summary:The relation between giant magnetoresistance (GMR) and microstructure has been investigated for AuCo 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 Au 85Co 15 aged 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.
ISSN:0304-8853
DOI:10.1016/0304-8853(94)00724-1