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Reorientation of Spin Density Waves in Cr(001) Films induced by Fe(001) Cap Layers

P. Bödeker·A. Hucht·A. Schreyer·J. Borchers·F. Güthoff·H. Zabel
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Abstract

Proximity effects of 20 Åthin Fe layers on the spin density waves (SDWs) in epitaxial Cr(001) films are revealed by neutron scattering. Unlike in bulk Cr we observe a SDW with its wave vector Q pointing along only one {100} direction which depends dramatically on the film thickness t_{Cr}. For t_{Cr} < 250 Åthe SDW propagates out-of-plane with the spins in the film plane. For t_{Cr} > 1000 Åthe SDW propagates in the film plane with the spins out-of-plane perpendicular to the in-plane Fe moments. This reorientation transition is explained by frustration effects in the antiferromagnetic interaction between Fe and Cr across the Fe/Cr interface due to steps at the interface.

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P. Bödeker, A. Hucht, A. Schreyer, J. Borchers, F. Güthoff, H. Zabel. 1998-09-23. Reorientation of Spin Density Waves in Cr(001) Films induced by Fe(001) Cap Layers. https://doi.org/10.1103/physrevlett.81.914

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