Abstract
The effect of magnetoresonance emf (MREMF) in thin epitaxial films of rare-earth manganites La0.67Sr0.33MnO3 is detected and investigated. The effect is manifested in the occurrence of a constant voltage under the action of microwave pumping in magnetic fields corresponding to ferromagnetic resonance conditions. The MREMF signal includes symmetric and antisymmetric components and changes its polarity upon switching of the external magnetic field. The temperature dependence of the effect (including the range in the neighborhood of the phase transition) is analyzed. The experimental data including the shape of the signal and its dependence of the field orientation are in good agreement with the results obtained in the theoretical model based on the mechanism of anisotropic magnetoresistance. It is shown that the magnetoresistance anisotropy in the manganite under investigation is negative and sharply attenuates as the temperature approaches the Curie point, almost vanishing in the paramagnetic phase.
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Original Russian Text © V.A. Atsarkin, B.V. Sorokin, 2014, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 146, No. 3, pp. 645–650.
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Atsarkin, V.A., Sorokin, B.V. Magnetoresonance EMF in thin manganite films. J. Exp. Theor. Phys. 119, 567–572 (2014). https://doi.org/10.1134/S1063776114080032
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DOI: https://doi.org/10.1134/S1063776114080032