Micromagnetic structure of Co-rich amorphous microwires

Authors
Shalyguina, EEBekoeva, LMShin, KH
Issue Date
2000-03
Publisher
JOURNAL MATER SCI TECHNOL
Citation
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, v.16, no.2, pp.183 - 185
Abstract
Results on the magneto-optical investigation of near-surface micromagnetic structure (MMS) of Co69Fe4Si12B15 amorphous wires 10 similar to 50 mu m in diameter are presented. The wires were prepared by the rapid solidification technique. The magnetic field H was applied along or perpendicular to the wire length. By scanning the light spot of 1 mu m-diameter along the wire length, distributions of magnetization components (both parallel and perpendicular to the applied magnetic field) and also local hysteresis characteristics of the wires were measured. It was experimentally established that owing to the compressive stresses from quenching coupled with negative magnetostriction of Go-rich amorphous materials, the examined microwires have a circumferential magnetic anisotropy. In consequence, there are the near-surface alternate left- and right-handled circular domains in these samples. The dependencies of the circular domain width on the wire diameter and length were found. It was discovered that in the axial magnetic field local hysteresis loops are unhysteretic. It was proved that in this case the dominant mechanism of the wire magnetization reversal is rotation of local magnetization vectors in circular domains.
Keywords
magneto-optical; micromagnetic; domain structure; microwires
ISSN
1005-0302
URI
https://pubs.kist.re.kr/handle/201004/141555
Appears in Collections:
KIST Article > 2000
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