Theoretical calculation for uniaxial anisotropies detection by using rotating magnetic fields

In this work we present a theoretical study of an alternative method for th e magnetic anisotropies constant measurement. We propose to use circular di scs of magnetic material that are magnetized under the action of a constant amplitude rotating magnetic field. By analyzing the different harmonic amp litudes of e.m.f. induced in a pick-up coil it is possible to obtain the an isotropy constant, K, and the in-plane anisotropy direction. (C) 1999 Elsev ier Science B.V. All rights reserved.