Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2003-07-23
J. Magn. Mag. Mat. 261 (2003) 295-303
Physics
Condensed Matter
Disordered Systems and Neural Networks
18 pages of LaTex, 5 eps figures. Originally submitted to J. Magn. Mag. Mater. on January 3, 2002
Scientific paper
10.1016/S0304-8853(02)01483-X
I present a study of the influence of disorder in thin magnetic films on the switching behavior of small magnetic cells of well defined shape and size. The disorder considered arises from randomly oriented crystalline grains of different shape, size, and crystalline orientation which gives rise to locally fluctuating intrinsic anisotropy directions and strengths. The study comprises a theoretical investigation of a disordered Stoner Wohlfarth model, as well as micromagnetic simulations. I show that the fluctuations in the total anisotropy and therefore in the switching fields are controlled by a single dimensionless parameter. The theoretical findings are well confirmed by micromagnetic simulations of many different samples
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