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Abstracts
Complex permeability (μ=μ_1-iμ_2) after-effect of near-zero magnetostrictive CoFeCrSiB amorphous alloy was investigated in magnetic field H (t)= H_0exp ( i 2π f t) after demagnetization. For frequencies f from 200 Hz to 2000 Hz and for the small amplitude H_0 < H_{cr} we observed practically constant both realμ_1 and imaginary part μ_2 of permeability. A measured small decrease in the real part μ_1 and increase in the imaginary part μ_2 with frequency f were theoretically calculated for a quadratic form of a domain wall potential E_S (x)=1/2α x^2. The calculated loss factortan δ =μ_2μ_1, which is small at amplitude H_0 < H_{cr}, corresponds to power losses due to eddy currents induced around reversibly moving domain walls.
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Journal
Year
Volume
Issue
Pages
43-46
Physical description
Dates
published
2008-01
received
2007-07-09
Contributors
author
- Department of Physics, FEI, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia
author
- Institute of Physics, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
author
- Institute of Physics, P. J. Šafárik University, Park Angelinum 9, 041 54 KoŠice, Slovakia
References
- 1. H. Kronmüller, Philos. Mag. B 48, 127 (1983)
- 2. S. Chikazumi, Physics of Magnetism, Wiley, New York 1964
- 3. P. Vojtaník, J. Kravčák, R. Varga, J. Magn. Magn. Mater. 157/158, 175 (1996)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1010kz