Effect of the second-order anistropy constant on the transverse susceptibility of uniaxial ferromagnets

Spinu, L.; Stancu, Al.; O’Connor, C. J.; Srikanth, H.
January 2002
Applied Physics Letters;1/14/2002, Vol. 80 Issue 2, p276
Academic Journal
A generalized theoretical approach of the transverse susceptibility, χ[sub T], in the case of uniaxial ferromagnets is presented. This advances the classical model of transverse susceptibility where only the first-order anisotropy constant, K[sub 1], is taken into account and makes possible the study of the influence of the second-order anisotropy constant, K[sub 2] on the χ[sub T] curves. It is shown that additional Barkhausen jumps driven by higher-order anisotropy constants emerge more evidently in the field dependence of χ[sub T] making their detection much easier than from the hysteresis loop. Based on the obtained results, we propose a simple method to determine both, K[sub 1] and K[sub 2] independently from χ[sub T] experiments. © 2002 American Institute of Physics.


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