Antiferromagnetic interlayer exchange coupling across an amorphous metallic spacer layer

Details Antiferromagnetic interlayer exchange coupling across an amorphous metallic spacer layer Antiferromagnetic interlayer exchange coupling across an amorphous metallic spacer layer

1998-02-13

arxiv.org/abs/cond-mat/9802148v1

Phys. Rev. Lett. 80 (22), 4983 (1998)

Physics

Condensed Matter

Typset using RevTex, 4 pages with 4 figures (.eps)

Scientific paper

10.1103/PhysRevLett.80.4983

By means of magneto-optical Kerr effect we observe for the first time antiferromagnetic coupling between ferromagnetic layers across an amorphous metallic spacer layer. Biquadratic coupling occurs at the transition from a ferromagnetically to an antiferromagnetically coupled region. Scanning tunneling microscopy images of all involved layers are used to extract thickness fluctuations and to verify the amorphous state of the spacer. The observed antiferromagnetic coupling behavior is explained by RKKY interaction taking into account the amorphous structure of the spacer material.

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