GMR AND MICROSTRUCTURE IN BULK AU-CO NANOGRANULAR ALLOYS

Authors
KATAOKA N TAKEDA H ECHIGOYA J FUKAMICHI K AOYAGI E SHIMADA Y OKUDA H OSAMURA K FURUSAKA M GOTO T
Citation
N. Kataoka et al., GMR AND MICROSTRUCTURE IN BULK AU-CO NANOGRANULAR ALLOYS, Journal of magnetism and magnetic materials, 144, 1995, pp. 621-622
Citations number
12
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
144
Year of publication
1995
Part
1
Pages
621 - 622
Database
ISI
SICI code
0304-8853(1995)144:<621:GAMIBA>2.0.ZU;2-4
Abstract
The relation between giant magnetoresistance (GMR) and microstructure has been investigated for Au-Co bulk nanogranular alloys prepared by w ater-quenching and subsequent aging. The GMR has been observed after a ging. In particular, 12% of the magnetoresistance (MR) ratio is achiev ed at room temperature in the Au85Co15 aged at 250 degrees C for 100 h , which is larger than the ratio in Co/Au multilayers. The Co precipit ates confirmed to be of disk-shape with 20 nm long and 0.6 nm thick wi th the shape of MR curve affected by TEM.