Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26309
Title: Epitaxial growth and interface strain coupling effects in manganite film/piezoelectric-crystal multiferroic heterostructures
Authors: Zheng, RK
Wang, Y 
Liu, YK
Gao, GY
Fei, LF
Jiang, Y
Chan, HLW 
Li, XM
Luo, HS
Li, XG
Keywords: Thin film
Epitaxial growth
Electronic characterisation
Transport properties
Issue Date: 2012
Publisher: Elsevier
Source: Materials chemistry and physics, 2012, v. 133, no. 1, p. 42-46 How to cite?
Journal: Materials chemistry and physics 
Abstract: We constructed multiferroic structures by epitaxially growing colossal magnetoresistive La 0.7Sr 0.3MnO 3 (LSMO) thin films on piezoelectric single-crystal substrates of composition 0.67Pb(Mg 1/3Nb 2/3)O 3-0.33PbTiO 3 (PMN-PT). Due to the efficient elastic coupling at the interface, the electric-field-induced piezoelectric strain (ε piezo) in the PMN-PT substrate is effectively transferred to the LSMO film, giving rise to a remarkable modulation of the lattice strain, resistivity, and Curie temperature T C of the LSMO film. Particularly, it was found that the magnetic field has an opposite effect on the strain-tunability of resistivity above and below T C. Moreover, we found that the resistivity of the film is most sensitive to ε piezo near T C and becomes less sensitive to ε piezo when the temperature is lower or higher than T C. These, together with the well fitted resistivity data into a phenomenological model based on coexisting phases, demonstrate that the phase separation is crucial to understand the strain-mediated multiferroic properties in manganite film/PMN-PT structures.
URI: http://hdl.handle.net/10397/26309
ISSN: 0254-0584
EISSN: 1879-3312
DOI: 10.1016/j.matchemphys.2011.12.019
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