Strain-mediated electric-field control of photoinduced demagnetization in La0.8Ca0.2MnO3 thin films
作者： EJ Guo , J Gao , HB Lu , None
DOI: 10.1063/1.3556613
关键词: Demagnetizing field 、 Polaron 、 Piezoelectricity 、 Condensed matter physics 、 Materials science 、 Thin film 、 Electric field 、 Photoconductivity 、 Nuclear magnetic resonance 、 Ferroelectricity 、 Pulsed laser deposition
摘要: La0.8Ca0.2MnO3 (LCMO) thin films have been epitaxially grown on ferroelectric 0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 (PMN-PT) substrates. The substrate-induced strain effects the transport and photoinduced demagnetization in LCMO were investigated. resistances (PRs) of systematically changed versus temperature before after ferroelectric-poling PMN-PT, indicating that photoexcited extra carriers may suppress neighboring spin correlation due to photoassisted hopping anti-Jahn–Teller polarons. Moreover, a significant modulation PR by electric fields applied across PMN-PT was observed. In situ x-ray diffraction indicates observed variations result from polarization or converse piezoelectric effect.
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