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Telecommunications and Radio Engineering
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ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v63.i11.40
pages 975-983

Magnetoresonance and Magnetoimpedance Properties of Nanocomposites with Spin-Dependent Tunnel Magnetoresistance

T. V. Bagmut
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., Kharkiv 61085, Ukraine
S. V. Nedukh
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61077, Ukraine
M. K. Khodzitsky
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., Kharkiv 61085, Ukraine


Effect of giant magnetoimpedance (GMI), tunnel magnetoresistance (TMR) for magnetic structures (CoFeZr)xSiO1−x—composite (x% = 34, 40, 43, 47), Cox(TiO2)1−x in the millimeter wavelength range have been studied. An EPR (electron paramagnetic resonance) method has been used to record the ferromagnetic resonance lines at 300 K on frequencies of 38 to 45 GHz. The magnetic field-dependent resonant frequencies have been found and analyzed. Based upon the data obtained the concentration dependencies of saturation magnetization Ms of a substance are calculated for the case where an external static magnetic field is applied in a sample plance. The concentration dependencies of absorption lines have been examined.

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