Spin Spring Behavior in Exchange Coupled Soft and High-Coercivity HardFerromagnets

摘要

The magnetization reversal processes in an epitaxial Fe/Sm2Co7 structure wereinvestigated using the magneto-optical indicator film technique. The dependence of the magnitude and the orientation of the structure average magnetization have been studied on both cycling and rotating the external magnetic field. (t was discovered that the magnetization reversal of the soft ferromagnet can proceed by formation of not only one-dimensional, but also two-dimensional, exchange spin springs. Experimental data is compared with a theoretical estimation of the rotational hysteresis loop for a spin system containing a one-dimensional exchange spring.