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Lattice Mismatch Effects between the Substrate and GMR La 0.7 Sr 0.3 MnO 3 Thin Films Studied by Scanning Probe Microscopy and Raman Spectroscopy
Author(s) -
Bormann D.,
Desfeux R.,
Degave F.,
Khelifa B.,
Hamet J. F.,
Wolfman J.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199909)215:1<691::aid-pssb691>3.0.co;2-4
Subject(s) - raman spectroscopy , materials science , thin film , microstructure , spectroscopy , magnetic force microscope , condensed matter physics , ferromagnetism , atomic force microscopy , substrate (aquarium) , microscopy , scanning probe microscopy , nuclear magnetic resonance , analytical chemistry (journal) , magnetization , optics , chemistry , nanotechnology , composite material , magnetic field , physics , quantum mechanics , chromatography , geology , oceanography
The characterisation by magnetic force microscopy (MFM) of the magnetic microstructure of the surface of two ferromagnetic La 0.7 Sr 0.3 MnO 3 films deposited on two oriented LaAlO 3 (001) and SrTiO 3 (001) substrates is reported. Using Raman spectroscopy, the vibrational modes of the thin films are studied and compared to the bulk ones. We show that the magnetic pattern recorded by MFM for the two films can be correlated to shifts of modes in the Raman spectroscopy spectra. These results are explained by taking into account the lattice mismatch between the film and the substrate and interpreted in terms of stress induced in the film by the substrate.