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Unstable magnetisation processes

P G McCormick, R Street and Y Estrin

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LETTER TO THE EDITOR

The description of magnetisation kinetics in terms of a magnetic constitutive equation has been extended to examine the instability (localisation) of magnetisation. It is shown that there are two separate instability conditions. One requires the magnetisation curve to have regions of negative susceptibility (a re-entrant loop), the other requires anomalous values of the magnetisation rate dependence of the magnetic field.


PACS

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

75.30.Cr Saturation moments and magnetic susceptibilities

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 15 (16 April 1990)



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