Electronic paramagnetic resonance of Gd3+ ions in a Pb1-x-yGdxCuyS narrow-gap semiconductor: effects of resonance transitions on conductivity
- Authors: Ulanov V.А.1,2,3, Zaynullin R.R.2, Yatsyk I.V.1, Shestakov A.V.4, Sinitsin A.М.2
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Affiliations:
- Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”
- Kazan State Power Engineering University
- Prokhorov General Physics Institute of the Russian Academy of Sciences
- Issue: Vol 88, No 12 (2024)
- Pages: 1919-1925
- Section: Nanooptics, photonics and coherent spectroscopy
- URL: https://journals.rcsi.science/0367-6765/article/view/286510
- DOI: https://doi.org/10.31857/S0367676524120129
- EDN: https://elibrary.ru/EWESUL
- ID: 286510
Cite item
Abstract
In a crystals of the narrow-band semiconductor Pb1-x-yGdxCuyS (x = 1.1·10–3, y = 2.5·10–3) at temperatures T = 5—300 K, unusual dependences of the shape of the lines of the EPR spectra of paramagnetic centers Gd3+ on the temperature and microwave power level in the resonator of EPR-spectrometer were discovered by the electron paramagnetic resonance method. Based on the results of the analysis of the shape parameters of the resonance lines recorded in the X-range, it was concluded that one of the reasons for the unusual changes in the observed EPR spectra of Gd3+ centers is the uneven distribution of the acceptor impurity of copper with the formation of regions with different concentrations of free charge carriers. Apparently, in these regions, resonant transitions between the spin states of Gd3+ centers have different effects on the values of the kinetic characteristics of free charge carriers, which lead to different contributions to the quasi-resonant absorption of microwave power.
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About the authors
V. А. Ulanov
Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”; Kazan State Power Engineering University;
Email: rrza7@yandex.ru
Zavoisky Physical-Technical Institute
Russian Federation, Kazan; KazanR. R. Zaynullin
Kazan State Power Engineering University
Author for correspondence.
Email: rrza7@yandex.ru
Russian Federation, Kazan
I. V. Yatsyk
Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”
Email: rrza7@yandex.ru
Zavoisky Physical-Technical Institute
Russian Federation, KazanA. V. Shestakov
Prokhorov General Physics Institute of the Russian Academy of Sciences
Email: rrza7@yandex.ru
Russian Federation, Moscow
A. М. Sinitsin
Kazan State Power Engineering University
Email: rrza7@yandex.ru
Russian Federation, Kazan
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