Abstract
We constructed multiferroic structures by epitaxially growing colossal magnetoresistive La0.7Sr0.3MnO3 (LSMO) thin films on piezoelectric single-crystal substrates of composition 0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 (PMN-PT). Due to the efficient elastic coupling at the interface, the electric-field-induced piezoelectric strain (ɛpiezo) 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 TC 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 TC. Moreover, we found that the resistivity of the film is most sensitive to ɛpiezo near TC and becomes less sensitive to ɛpiezo when the temperature is lower or higher than TC. 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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
