INTERACTION EFFECTS IN SWITCHING OF A 2-DIMENSIONAL ARRAY OF SMALL PARTICLES

The magnetostatic interaction between elements of a regular two-dimens ional array of rectangular garnet pixels has been investigated, The up - and down switching fields of an individual pixels, have been measure d magnetooptically. The switching characteristics of a given pixel dep ends on the state of the neighbors, Zn this work the effect of the mag netization state of the first 5 coordination shells on a central, test pixel was investigated experimentally and numerically, The interactio n field, i.e. the demagnetizing/magnetizing effects, is calculated exa ctly and in the dipole approximation for 24 pixels surrounding the cen tral pixel. A good agreement between experimental and numerical result s has been obtained.