The Domain Structure of a Silicon-Iron Crystal

Abstract

Powder patterns have been obtained on the (100) and (011) surfaces of a carefully shaped single crystal of 3% silicon-iron, of dimensions 13 mm × 6 mm × 6 mm, and these have permitted a more thorough quantitative test of proposed ferromagnetic domain structures than has been made hitherto. The patterns on the (011) surface are very beautiful and complicated Although the measurements of domain spacings on both planes under Mode III magnetization conditions, as well as measurements of the angles between the domain vectors and main domain boundaries, confirm the essential features of the main structure proposed by Néel, there are found considerable numerical discrepancies which are attributed to the complicated nature of the closure domains on the (011) surface.