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Microwave losses in ferromagnetic thin LSMO films

T. NURGALIEV1,* , V. V. DEMIDOV2, A. M. PETRZHIK2, G. A. OVSYANNIKOV2, S. MITEVA1, B. BLAGOEV1

Affiliation

  1. Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chausse, 1784 Sofia, Bulgaria
  2. Institute of Radio Engineering and Electronics RAS, Moscow 125009, Mokhovay 11, bld 7, Russia

Abstract

Thin films of the La0.7Sr0.3MnO3 (LSMO) manganite material were prepared on LAO substrates by RF magnetron sputtering and their microwave characteristics were investigated. The EPR absorption spectrum of one of the samples showed a double-line character below the Curie temperature. The effect was interpreted as due to a coexistence of the paramagneticand ferromagnetic-like phases in the sample and the main microwave parameters of these phases were determined at T=293 K. A possibility for investigation of ferromagnetic resonance (FMR) in thin films using a simple parallel plate resonator was demonstrated..

Keywords

LSMO film, microwave properties, EPR.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

T. NURGALIEV, V. V. DEMIDOV, A. M. PETRZHIK, G. A. OVSYANNIKOV, S. MITEVA, B. BLAGOEV, Microwave losses in ferromagnetic thin LSMO films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 273-276 (2008)