Low Temperature Physics: 40, 655 (2014); https://doi.org/10.1063/1.4890988
Fizika Nizkikh Temperatur: Volume 40, Number 7 (July 2014), p. 842-850    ( to contents , go back )

Specific features of the temperature behavior of ESR

K. Lamonova1,2, B. Bekirov3, I. Ivanchenko3, N. Popenko3,E. Zhitlukhina1, V. Burkhovetskii1, S. Orel1,and Yu. Pashkevich1,2

1A. Galkin Dоnetsk Institute for Physics and Engineering, NASU, Donetsk 83114, Ukraine
E-mail: lamonova@fti.dn.ua

2Донецкий национальный университет, пр. Гурова, 14, г. Донецк, 83001, Украина

3O. Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine Kharkiv 61085, Ukraine
pos Анотація:

Received February 25, 2014

Abstract

The ESR study of dilute magnetic semiconductors HgSe:Fe with 2·1018 sm–3 < NFe <3·1019 sm–3 concentrations has been carried out in the 77 K < T < 300 K temperature range. With the microstructure analysis it is shown that the iron ions are distributed uniformly in the bulk of the HgSe:Fe samples and they do not form around themselves a crystal structure different from the structure of zincblende. Based on the g-factor calculations it is concluded that the Fe3+ ions in tetrahedral sites in HgSe samples are the source of the ESR signal; the ESR spectra are formed by the joint effect of Jahn-Teller’s distortions of the tetrahedral environment and displacements of the iron ion from the tetrahedron center; the modification of the ESR spectra with increasing the iron concentration can be explained by the model of regular lattice of charged donors. The temperature onset of the regular lattice of impurity ions corresponds to the maximum of the ESR linewidth-temperature dependence for samples with different iron concentrations.

PACS: 76.30.–v Electron paramagnetic resonance and relaxation;
PACS: 76.30.Da Ions and impurities: general;
PACS: 75.50.Pp Magnetic semiconductors.

Key words: ESR spectra, diluted magnetic semiconductors, Fe3+ ions

Published online: May 21, 2014

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