Magnetic domain structures of La0.67Sr0.33MnO3 thin films with different morphologies

Using a wide-field Kerr microscope, we have studied the magnetic domain structures of epitaxial and polycrystalline La0.67Sr0.33MnO3 thin films as well as a film having thermally induced 〈110〉 microcracks. The epitaxial film on a (001) SrTiO3 substrate has different magnetic domain behaviors for in-...

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Bibliographic Details
Published in:Journal of applied physics 1997-10, Vol.82 (8), p.3934-3939
Main Authors: Lecoeur, P., Trouilloud, P. L., Xiao, Gang, Gupta, A., Gong, G. Q., Li, X. W.
Format: Article
Language:English
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Summary:Using a wide-field Kerr microscope, we have studied the magnetic domain structures of epitaxial and polycrystalline La0.67Sr0.33MnO3 thin films as well as a film having thermally induced 〈110〉 microcracks. The epitaxial film on a (001) SrTiO3 substrate has different magnetic domain behaviors for in-plane fields applied along the 〈100〉 and 〈110〉 directions. Magnetic domain orientation and contrast suggest a biaxial magnetic anisotropy with 〈110〉 easy axes. Defects such as microcracks and grain boundaries have a strong perturbing effect on the local magnetization and can lead to an enhanced and controllable spin-dependent scattering.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.365700