Abstract
We have studied the process of magnetization reversal in a thin-film Fe/Sm2Co7 exchange coupled bilayer structure under the action of an in-plane external field. An analysis of the local magnetization changes, as measured using the magnetooptical indicator film technique, showed that the magnetization reversal proceeds by inhomogeneous rotation of the magnetic moments in Fe and SmCo layers, both in plane and in the perpendicular direction. It is established that, because of the exchange interaction between layers, the magnetization reversal along the easy axis in the entire structure is determined primarily by the formation of exchange-induced spin helices and domain walls in the magnetically soft layer, whereas the magnetization reversal at an angle of α with respect to the easy axis plays a significant role in the magnetically hard layer and becomes dominating for α=90°.
Similar content being viewed by others
References
E. F. Kneller and R. Hawig, IEEE Trans. Magn. TM-27(4), 3588 (1991).
E. E. Fullerton et al., Appl. Phys. Lett. 72(3), 380 (1998).
C. Platt et al., Appl. Phys. Lett. 79(24), 3992 (2001).
J. S. Jiang et al., IEEE Trans. Magn. TM-35(5), 3229 (1999).
M. Bevaissa et al., IEEE Trans. Magn. TM-34(4), 1204 (1998).
V. S. Gornakov et al., J. Magn. Magn. Mater. 246, 80 (2002).
K. J. Strnat and R. M. W. Strnat, J. Magn. Magn. Mater. 100, 38 (1991).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 29, No. 5, 2003, pp. 8–14.
Original Russian Text Copyright © 2003 by Kabanov, Gornakov.
Rights and permissions
About this article
Cite this article
Kabanov, Y.P., Gornakov, V.S. Peculiarities of the magnetization reversal in heterophase nanocomposite permanent magnets. Tech. Phys. Lett. 29, 178–180 (2003). https://doi.org/10.1134/1.1565626
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1565626