Spin Spring Behavior in Exchange Coupled Soft and High-Coercivity Hard Ferromagnets

Published

July 1, 2001

Author(s)

Robert D. Shull, Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, J.S. Jiang, H Kaper, G Leaf, S D. Bader

Abstract

The magnetization reversal processes in an epitaxial Fe/Sm₂Co₇ structure were investigated 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. Magnetization reversal of the soft ferromagnet was found to proceed by the formation of exchange springs due to spin winding in both the thickness and perpendicular directions as adjacent sub-domains with opposite chirality are created. Experimental data is compared with a theroretical estimation of the rotational hysteresis loop for a spin system containing a one-dimensional (single chirality) exchange spring.

Citation

IEEE Transactions on Magnetics

Volume

37

Issue

No. 4

Pub Type

Journals

Keywords

exchange spring, magnetization reversal, permanent magnet, SmCo, thin film

Citation

Shull, R. , Shapiro, A. , Gornakov, V. , Nikitenko, V. , Jiang, J. , Kaper, H. , Leaf, G. and Bader, S. (2001), Spin Spring Behavior in Exchange Coupled Soft and High-Coercivity Hard Ferromagnets, IEEE Transactions on Magnetics (Accessed October 27, 2025)