Room-temperature Perminyar effect and wide domain walls in nearly-zero magnetostrictive amorphous ribbons

The low field ac susceptibility, χ=χ′−jχ′′, and domain structures of as-cast, stress relieved, and field annealed CoFeSiB amorphous ribbons are studied in the remanence state. An eddy current loss analysis is made based on a model which combines the contributions of domain wall displacements (DWD) and domain magnetization rotations (DMR). It is found that although having similar longitudinal bar domain structures, χ of the field annealed ribbon is due to DWD, but it is dominated by DMR for the first two, which indicates a nonuniform magnetization in the domains.

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AC magnetization analyses in iron-rich amorphous wires

Chen

Dempsey

Hernando

et al. 1995

J. Phys. D: Appl. Phys.

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Domain wall depinning and propagation in a long wire of amorphous Fe77.5Si7.5B15 alloy in the as-quenched state are studied during AC magnetization under a DC biasing field produced by a solenoid perpendicular to the wire. The active walls undergoing the depinning and propagation are classified into positive and negative ones. Consequently there are alternating and unidirectional magnetic reversal modes, both having two distinct types. The alternating mode can easily be induced by an external magnetic pole equidistant from the wire ends. The experimental data obtained in this work and published elsewhere are discussed in detail. It is concluded that the eventual depinning of the closure domain wall from the end is induced by its elongation and transverse movements. The latter process is essentially the same as domain wall propagation. Both are dynamic with a dominant eddy current damping and domain wall shape-dependent DC critical field.

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Room-temperature Perminyar effect and wide domain walls in nearly-zero magnetostrictive amorphous ribbons

Cited by 6 publications

References 5 publications

Anomalous loss factor of annealed nearly non-magnetostrictive amorphous wire

Anomalous loss factor of annealed nearly non-magnetostrictive amorphous wire

Nonuniform domain magnetization in CoFeSiB amorphous ribbons

AC magnetization analyses in iron-rich amorphous wires

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