Volume 54, Number 5, June 2001
|Page(s)||619 - 625|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 December 2003|
Coupling between lattice distortions and magnetism in thin films
Max-Planck-Institut für Metallforschung
Heisenbergstr. 1, 70569 Stuttgart, Germany
2 Department of Physics, Brock University St. Catherines, Ontario L2S 3A1, Canada
3 Max-Planck-Institut für Festkörperforschung Heisenbergstr. 1, 70569 Stuttgart, Germany
Accepted: 14 March 2001
X-ray scattering experiments have demonstrated that for thin films (100 to 500) of epitaxially grown on (100) substrates, the accommodation of the lattice mismatch between film and substrate gives rise to a modulated structure. The non-bulk-like structural properties of these thin films are the origin of anomalies in the electronic and magnetic behavior. Studies of the lattice as a function of temperature clearly reveal a magnetostrictive effect close to the Curie temperature. For thicker films the strain relief mechanism is replaced by formation of coherent microtwins and some of the bulk properties are recovered, but some differences are still observed.
PACS: 61.10.Eq – X-ray scattering (including small-angle scattering) / 68.55.Jk – Structure and morphology; thickness; crystalline orientation and texture / 71.30.+h – Metal-insulator transitions and other electronic transitions
© EDP Sciences, 2001
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