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Magnetic Pseudoresonance in Manganite Thin Films

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Abstract

A strong narrow peak in the field dependence of the radio-frequency absorption (the magnetic pseudoresonance) has been found and investigated in epitaxial thin films of La2/3Sr1/3MnO3 possessing uniaxial magnetic anisotropy in the film plane. The peak is observed when the in-plane external magnetic field H is directed perpendicular to the easy axis and equals to the anisotropy field H u. The frequency dependence of the peak magnitude measured in the frequency range of 10–300 MHz approximately follows the Debye law behavior with the characteristic relaxation time of about 2.2 ns. The physical model of the phenomenon is suggested, based on the giant increase in static transversal susceptibility due to a sharp reorientation of the equilibrium magnetization when approaching the pseudoresonance conditions.

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Acknowledgments

The work was supported by the Russian Foundation for Basic Research, project no. 14-02-00165. We thank G. A. Ovsyannikov and A. M. Petrzhik for providing us with the samples under study.

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Authors and Affiliations

  1. Kotel’nikov Institute of Radio Engineering and Electronics of RAS, 11 Mokhovaya Str., 125009, Moscow, Russia

    V. A. Atsarkin, V. V. Demidov & V. Yu. Nagorkin

  2. Fryazino Branch, Kotel’nikov Institute of Radio Engineering and Electronics of RAS, 1 Vvedenskii Square, 141190, Fryazino, Moscow Region, Russia

    A. E. Mefed

  3. Moscow Physics and Technical Institute, 141700, Dolgoprudnyi, Moscow Region, Russia

    V. Yu. Nagorkin

Authors
  1. V. A. Atsarkin
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  2. V. V. Demidov
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  3. A. E. Mefed
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  4. V. Yu. Nagorkin
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Correspondence to V. A. Atsarkin.

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Atsarkin, V.A., Demidov, V.V., Mefed, A.E. et al. Magnetic Pseudoresonance in Manganite Thin Films. Appl Magn Reson 45, 809–816 (2014). https://doi.org/10.1007/s00723-014-0554-2

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  • DOI: https://doi.org/10.1007/s00723-014-0554-2

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