This article is cited in 2 papers

Studying the mechanism of exchange coupling in ferro/ferrimagnet NiFe/DyCo film structures

G. I. Frolov^ab, V. A. Seredkin^ab, V. Yu. Yakovchuk<sup>ab

a</sup> L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk
^b M. F. Reshetnev Siberian State Aerospace University,

Abstract: Dependence of the magnetic and magnetooptical properties of an exchange-coupled NiFe/DyCo bilayer system on the thickness (t DyCo) of a magnetically hard layer has been studied. It is established that the unidirectional anisotropy vanishes at $t_{\mathrm{DyCo}}\sim$ 400 $\mathring{\mathrm{A}}$, while the coercive field in the magnetically soft layer becomes comparable to the exchange-induced field shift. In this case, the DyCo layer magnetization is almost parallel to the film plane, whereas a reference DyCo film exhibits a perpendicular anisotropy. A model of the magnetic state of layers in the ferro/ferrimagnetic layer structure under consideration is proposed, which assumes that a 180$^\circ$ domain wall is formed at the interface upon magnetization reversal in the magnetically soft layer.

Received: 10.08.2009

 English version: Technical Physics Letters, 2010, 36:1, 57–59

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