Controlling orbital moment and spin orientation in CoO layers by strain

We have observed that CoO films grown on different substrates show dramatic differences in their magnetic properties. Using polarization dependent x-ray absorption spectroscopy at the Co L\(_{2,3}\) edges, we revealed that the magnitude and orientation of the magnetic moments strongly depend on the...

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Bibliographic Details
Published in:arXiv.org 2005-04
Main Authors: Csiszar, S I, Haverkort, M W, Z Hu, Tanaka, A, Hsieh, H H, H -J Lin, Chen, C T, Hibma, T, Tjeng, L H
Format: Article
Language:English
Subjects:
Magnetic anisotropy
Magnetic films
Magnetic moments
Magnetic properties
Magnetism
Spin-orbit interactions
Substrates
X ray absorption
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Summary:We have observed that CoO films grown on different substrates show dramatic differences in their magnetic properties. Using polarization dependent x-ray absorption spectroscopy at the Co L\(_{2,3}\) edges, we revealed that the magnitude and orientation of the magnetic moments strongly depend on the strain in the films induced by the substrate. We presented a quantitative model to explain how strain together with the spin-orbit interaction determine the 3d orbital occupation, the magnetic anisotropy, as well as the spin and orbital contributions to the magnetic moments. Control over the sign and direction of the strain may therefore open new opportunities for applications in the field of exchange bias in multilayered magnetic films.
ISSN:2331-8422
DOI:10.48550/arxiv.0504519