Experimental investigation of mu super()-effect near the grain boundaries in grain-oriented silicon steel sheets

The regularities of magnetization M distribution and behaviour of domain structure near the planar grain boundaries (GB) in grain-oriented silicon steel (GOSS) sheets, which had been magnetized by homogeneous external magnetic fields along the rolling direction, were investigated. It was found that there are such perturbations delta M of the spontaneous magnetization M super(s) which is the direct experimental evidence of mu super(*)-effect existence at the GB. The peculiarities of this effect near the planar GB with different orientation of axes < 100 > at neighbouring crystals of GOSS sheets are discussed.