کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1524174 995335 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Epitaxial growth and interface strain coupling effects in manganite film/piezoelectric-crystal multiferroic heterostructures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Epitaxial growth and interface strain coupling effects in manganite film/piezoelectric-crystal multiferroic heterostructures
چکیده انگلیسی

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.


► La0.7Sr0.3MnO3 films were epitaxially grown on piezoelectric single crystals.
► Piezoelectric strain modulates the strain and physical properties of the films.
► Magnetic field has an opposite effect on the strain effects above and below TC.
► Phase separation is crucial to understand the strain-mediated film properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 133, Issue 1, 15 March 2012, Pages 42–46
نویسندگان
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