Low Temperature Physics: 47, 220 (2021); https://doi.org/10.1063/10.0003522
Fizika Nizkikh Temperatur: Volume 47, Number 3 (March 2021), p. 241-247    ( to contents , go back )

Analysis of low-temperature FMR spectra of Fe3O4 and ZnFe2O4 nanoparticles synthesized using organic molecules

K. Yu. Sova, A. S. Vakula, and S. I. Tarapov

O. Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine Kharkov 61085, Ukraine
E-mail: katerinesova@gmail.com

A. G. Belous and S. O. Solopan

Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine Kiev 03142, Ukraine
pos Анотація:608

Received November 11, 2020, published online January 26, 2021


The ferromagnetic resonance (FMR) spectra of Fe3O4 and ZnFe2O4 nanoparticles with organic synthesis products were studied at T = 4.2 K. It was determined that the sintering of nanoparticles induced by post-synthesis heat treatment forms a mechanically unstable transition layer between them. Changes in the FMR spectra of Fe3O4 nanoparticles synthesized by precipitation in microemulsions using octylphenol ethoxylate and by the cryochemical method are mainly determined by the field of dipole-dipole interaction between nanoparticles.

Key words: nanoparticles, nanopowders, ferromagnetic resonance, microwave frequencies, low temperatures, organic molecules.

Download 1017681 byte View Contents