Microstructural influence on magnetic properties and giant magnetoresistance of melt-spun gold-cobalt

Journal Article · Thu Nov 30 23:00:00 EST 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00401-G· OSTI ID:131453

Huetten, A; Bernardi, J; Thomas, G ^[1]; Friedrichs, S ^[2]; Balcells, L ^[3]

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1. Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering
2. Univ. of Goettingen (Germany). Institut fuer Metallphysik
3. Univ. of California, San Diego, CA (United States). Center for Magnetic Recording Research

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.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 131453
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 10-11 Vol. 33; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
ANTIFERROMAGNETISM
COBALT ALLOYS
EUTECTICS
FERROMAGNETISM
GOLD ALLOYS
LAMELLAE
MAGNETIC PROPERTIES
MAGNETORESISTANCE
MICROSTRUCTURE
MORPHOLOGY
PARTICLE SIZE
PRECIPITATION
TRANSMISSION ELECTRON MICROSCOPY