Tuning the magnetic anisotropy in LSMO manganite films through non-magnetic 
nanoparticles

Gao, Y. Z.; Zhang, J. C.; Fu, X. W.; Cao, G. X.; Habermeier, H.-U.

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Tuning the magnetic anisotropy in LSMO manganite films through non-magnetic nanoparticles

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Habermeier, H.-U.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Gao, Y. Z., Zhang, J. C., Fu, X. W., Cao, G. X., & Habermeier, H.-U. (2013). Tuning the magnetic anisotropy in LSMO manganite films through non-magnetic nanoparticles. Progress in Natural Science: Materials International, 23(2), 127-132.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C419-9

Abstract

We report the observation of anomalous magnetic anisotropy driven by nonmagnetic ZrO2 nanoparticles in epitaxial La2/3Sr1/3MnO (LSMO) films grown on LaAlO3 (LAO) substrates. The compressive epitaxial strain imposed by the lattice mismatch of substrate and film is tuned by the density of ZrO2 nanoparticles embedded in the film matrix and affects the magnetic anisotropy as well as the magnetotransport properties. Epitaxial 54 nm thick LSMO thin films with different concentrations of ZrO2 nanoparticles demonstrate anisotropic hysteresis loops concomitant with anisotropic magnetotresistance behavior. The biaxial epitaxial strain, induced by the substrate/film lattice parameter mismatch is partially relaxed by increasing the density of precipitates and they serve as a tuning parameter for the strain state. We interpret our results by a strain-induced interplay of impurity scattering, weak localization and magnetic domain structure. (c) 2013 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.