Large Magnetic Kerr Rotation in BiMn Alloy

Abstract
Ferromagnetic domains in BiMn crystallites are found to be easily observed by utilizing plane polarized light in reflection. A crystallite viewed parallel to the c0 axis shows a characteristic "rick rack" or zigzag pattern of domains as a stable configuration in zero field. Magnetic domain patterns reminiscent of spiral surface growth are observed. The large magneto-optic rotation is thought to be due to the high resistivity of BiMn alloy.