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Physical Review B - Condensed Matter and Materials PhysicsVolume 73, Issue 3, 2006, Article number 035213

Relaxation in ZnSe: Cr2+ investigated with longitudinal ultrasonic waves(Article)

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  • aInstitute for Metal Physics, Ural Department, Russian Academy of Sciences, Ekaterinburg, Russian Federation
  • bRussian State Vocational Pedagogial University, Ekaterinburg, Russian Federation

Abstract

Temperature dependences of phase velocity and absorption of ultrasound were investigated in ZnSe crystal doped with Cr2+ ions at the frequencies 32-158 MHz. Absorption peak and variation of phase velocity found in the temperature interval 10-20 K were interpreted as manifestation of the Jahn-Teller effect. Temperature dependences of relaxation time, relaxed, and unrelaxed moduli C= 1 2 (C11 + C12 +2 C44) were restored. The dependences were compared with the results of such investigations in ZnSe: Ni2+ and analyzed regarding lattice stability of the crystals. Fitting of the temperature dependence of the relaxation time was done with account of thermal activation over the potential barrier, quantum tunnelling with phonon emission, and two phonon process analogous to Raman scattering. Thermal activation proved to be the dominant mechanism of relaxation above 6 K and quantum tunnelling-below this temperature. © 2006 The American Physical Society.

  • ISSN: 10980121
  • CODEN: PRBMD
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1103/PhysRevB.73.035213
  • Document Type: Article

  Gudkov, V.V.; Institute for Metal Physics, Ural Department, Russian Academy of Sciences, Russian Federation;
© Copyright 2012 Elsevier B.V., All rights reserved.

Cited by 19 documents

Sarychev, M.N. , Zhevstovskikh, I.V. , Korostelin, Y.V.
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(2023) Journal of Experimental and Theoretical Physics
Gudkov, V.V. , Sarychev, M.N. , Zherlitsyn, S.
Sub-lattice of Jahn-Teller centers in hexaferrite crystal
(2020) Scientific Reports
Zhevstovskikh, I.V. , Gudkov, V.V. , Sarychev, M.N.
Magnetic Field Induced Relaxation Attenuation of Ultrasound by Jahn–Teller Centers: Application to ZnSe:Cr2+
(2016) Applied Magnetic Resonance
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