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2008 | 113 | 1 | 43-46
Article title

Complex Permeability After-Effect and Analysis of Power Losses in Ferromagnetic Co-Based Amorphous Alloy

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EN
Abstracts
EN
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.
Keywords
EN
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
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1010kz
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