Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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

Published

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

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 May 19, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created July 1, 2001, Updated February 17, 2017