A giant Barkhausen effect with second-order instability

A giant Barkhausen effect has been observed where magnetization proceeds continuously with field in a second-order instability process. This is contrasted with the typical giant Barkhausen effect in which the magnetization jumps, or moves discontinuosly with field in a first-order instability proces...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 1994-04, Vol.27 (4), p.681-684
Main Authors: Savage, H T, Chen, D -X, Gomez-Polo, C, Vazquez, M, Wun-Fogle, M
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Magnetic properties and materials
Magnetization curves, hysteresis, Barkhausen and related effects
Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects
Metals. Metallurgy
Physics
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Summary:A giant Barkhausen effect has been observed where magnetization proceeds continuously with field in a second-order instability process. This is contrasted with the typical giant Barkhausen effect in which the magnetization jumps, or moves discontinuosly with field in a first-order instability process. This second-order instability process has been found in iron-rich (Fe sub 77.5 Si sub 7.5 B sub 15 ) amorphous wires in two cases: (i) transverse field-annealed long wires and (ii) short as-cast wires. Anomalous losses are found to be very large and are of significant magnitude approx1 Hz.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/27/4/001