Change in Value of Effective Anisotropy of FeCoB Amorphous Alloys, Depending on Chemical Composition

S. Waltersa, M.M.A.B. Abdullahb, A.V. Sanduc, S. Garusd, M.A.A. Mohd Salehb, D.S. Che Halinb, F.F. Zainalb aAdvanced Engineering Centre, University of Brighton, BN2 4GJ, Brighton, United Kingdom bCentre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), 01000 Kangar, Perlis, Malaysia cGheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, Iasi, Romania dCzęstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa

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The magnetisation process of amorphous materials is similar to that of crystalline materials and consists of four stages. Each step influences the formation of the primary magnetisation curve. By using measurements in the ``easy,'' ``intermediate'' and ``difficult'' magnetisation directions, the primary magnetisation curves are obtained, on the basis of which the value of effective anisotropy can be determined. This paper presents the results of tests that were carried out on two amorphous alloys that are based on an Fe matrix. The value of effective anisotropy was related to the spin-wave stiffness parameter.

DOI:10.12693/APhysPolA.139.568 topics: effective anisotropy, amorphous alloys, primary magnetisation curve, saturation magnetisation