Vol. 91

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2020-03-24

Ferromagnetic Resonance Spectroscopy of CoFeZr -CaF 2 Granular Nanocomposites

By Tomasz N. Kołtunowicz, Vitalii Bondariev, Pawel Zukowski, Julia Sidorenko, Vadim Bayev, and Julia A. Fedotova
Progress In Electromagnetics Research M, Vol. 91, 11-18, 2020
doi:10.2528/PIERM19112107

Abstract

Results of the study of magnetic properties of nanocomposite samples (CoFeZr)x(CaF2)(100 - x) (31 at.% ≤ x ≤ 47 at.%) produced in argon (Ar) and argon with oxygen (Ar with O2) sputtering atmosphere are presented in this paper. The magnetic resonance spectroscopy at room temperature using continuous wave X-band electron spin resonance (ESR) was used for analysis of samples magnetic properties. After analysis it is established that in the case of samples produced in argon sputtering atmosphere the value of g increases with the rise of metal content and for samples produced in argon with oxygen atmosphere the value g decrease with the rise of x. Such a behavior of g(x) is explained by the presence of core-shell structure of NPs represented by ferromagnetic core and antiferromagnetic core that results in quenching of orbital motion of electrons.

Citation


Tomasz N. Kołtunowicz, Vitalii Bondariev, Pawel Zukowski, Julia Sidorenko, Vadim Bayev, and Julia A. Fedotova, "Ferromagnetic Resonance Spectroscopy of CoFeZr -CaF 2 Granular Nanocomposites," Progress In Electromagnetics Research M, Vol. 91, 11-18, 2020.
doi:10.2528/PIERM19112107
http://www.jpier.org/PIERM/pier.php?paper=19112107

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