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Angular dependence of coercivity for Nd15Fe77B8 in the temperature range from 4.2 to 300 K

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4 Author(s)
Otani, Yoshichika ; Dept. of Pure & Appl. Phys., Trinity Coll., Dublin, Ireland ; Miyajima, Hideki ; Kubodera, T. ; Chikazumi, S.

Defining the fields Bn1 and Bn2 , where the magnetization reversal begins and ends, the simple linear relationship Bn2=aBn1+bμ0 Ms/cos θ was observed, where a and b are coefficients. Furthermore, from the temperature dependence of the change in magnetic energy ΔE in the system, an activation volume was obtained as a function of temperature. The values are in good agreement with the results obtained from magnetic viscosity measurements. This indicates that magnetization reversal is thermally initiated in a small activation volume

Published in:

Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 5 )

Date of Publication:

Sep 1990

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