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Interaction effects in switching of a two dimensional array of small particles

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4 Author(s)
Pardavi-Horvath, M. ; Inst. for Magnetics Res., George Washington Univ., Washington, DC, USA ; Zheng, Guobao ; Vertesy, Gabor ; Magni, A.

The magnetostatic interaction between elements of a regular two-dimensional array of rectangular garnet pixels has been investigated. The up- and down switching fields of an individual pixels, have been measured magnetooptically. The switching characteristics of a given pixel depends on the state of the neighbors. In this work the effect of the magnetization state of the first 5 coordination shells on a central, test pixel was investigated experimentally and numerically. The interaction field, i.e. the demagnetizing/magnetizing effects, is calculated exactly and in the dipole approximation for 24 pixels surrounding the central pixel. A good agreement between experimental and numerical results has been obtained

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 5 )