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Microstructural influence on saturation magnetization, remanence, coercivity and giant magnetoresistance (GMR) of melt-spun Au{sub 1{minus}x}-Co{sub x} (x = 0.65 and 0.284) ribbons in the as-quenched state and subsequently annealed at 480 C has been investigated using analytical transmission electron microscopy. The evolution of the magnetic data with annealing time was found to be determined by the sequence of the formation of Co precipitates, their volume fraction, their particle size distribution and their morphology. GMR behavior was only measured for Au{sub 73.6}Co{sub 28.4} and is clearly caused by a lamellar eutectic with a structure similar to multilayers.
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| Authors: |
Huetten, A.;
Bernardi, J.;
Thomas, G. [Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering]|[Lawrence Berkeley Lab., CA (United States)];
Friedrichs, S. [Univ. of Goettingen (Germany). Institut fuer Metallphysik];
Balcells, L. [Univ. of California, San Diego, CA (United States). Center for Magnetic Recording Research]
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| Publication Date: | 1995 Dec 01 |
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| OSTI Identifier: | 131453 |
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| DOE Contract Number: | AC03-76SF00098 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Scripta Metallurgica et Materialia; Journal Volume: 33; Journal Issue: 10-11; Other Information: PBD: 1 Dec 1995 |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: pp. 1647-1666 |
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| Other Number(s): | Journal ID: SCRMEX; ISSN 0956-716X; TRN: IM9551%%52 |
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| Subject: | 36 MATERIALS SCIENCE; GOLD ALLOYS; MICROSTRUCTURE; MAGNETIC PROPERTIES; MAGNETORESISTANCE; COBALT ALLOYS; TRANSMISSION ELECTRON MICROSCOPY; PRECIPITATION; ANNEALING; PARTICLE SIZE; MORPHOLOGY; EUTECTICS; LAMELLAE; FERROMAGNETISM; ANTIFERROMAGNETISM |
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| Update Date: | 2009 Dec 16 |
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