MINOR LOOP BEHAVIOR IN CLASSICAL PREISACH HYSTERETIC SYSTEMS

Minor loop behavior have been investigated experimentally on magnetica lly uniaxial films of YIG based garnets and MnBi all having the easy d irection of the magnetization perpendicular to the film plane and unit squareness In these films the magnetization changes by domain wall mo tion. A regular two-dimensional array of small, strongly uniaxial part icles, etched from one of the films, is switching by rotation. The wip ing out property is observed for each sample, however, the congruence of the minor loops is fulfilled only for the 2D array, for minor loops centered on the H=0 axis. Accommodation of minor loops is observed fo r MnBi Depending on the start field of the switching process, the samp les can be prepared to display minor loops of very different shape.