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

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arxiv cond-mat/9807212 v2 pith:WQVKIRCV submitted 1998-07-14 cond-mat.mtrl-sci cond-mat.stat-mech

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

P. B\"odeker , A. Hucht , A. Schreyer , J. Borchers , F. G\"uthoff , H. Zabel This is my paper
classification cond-mat.mtrl-sci cond-mat.stat-mech
keywords filmdensityeffectsfilmsinterfacelayersout-of-planeplane
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Proximity effects of 20 \AA thin 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 \AA the SDW propagates out-of-plane with the spins in the film plane. For t_{Cr} > 1000 \AA the 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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