Abstract
The in-plane magnetic anisotropy of epitaxial La0.7Sr0.3MnO3 (LSMO) films is studied at room temperature by the following three independent techniques: magnetooptical Kerr effect, ferromagnetic resonance at a frequency of 9.61 GHz, and recording of absorption spectra of electromagnetic radiation at a frequency of 290.6 MHz. The films are deposited onto NdGaO3 (NGO) substrates in which the (110)NGO plane is tilted at an angle of 0–25.7° to the substrate plane. The uniaxial magnetic anisotropy induced by the strain of the film is found to increase with the tilt angle of the (110)NGO plane. A model is proposed to describe the change in the magnetic anisotropy energy with the tilt angle. A sharp increase in the radio-frequency absorption in a narrow angular range of a dc magnetic field near a hard magnetization axis is detected The anisotropy parameters of the LSMO films grown on (110)NGO, (001)SrTiO3, and (001)[(LaAlO3)0.3 + (Sr2AlTaO6)0.7] substrates are compared.
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Original Russian Text © V.V. Demidov, I.V. Borisenko, A.A. Klimov, G.A. Ovsyannikov, A.M. Petrzhik, S.A. Nikitov, 2011, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2011, Vol. 139, No. 5, pp. 943–951.
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Demidov, V.V., Borisenko, I.V., Klimov, A.A. et al. Magnetic anisotropy of strained epitaxial manganite films. J. Exp. Theor. Phys. 112, 825–832 (2011). https://doi.org/10.1134/S1063776111040029
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DOI: https://doi.org/10.1134/S1063776111040029