Peculiarities of the relaxation processes in ReBa2Cu3O7-x (Re = Y, Ho) single crystals at room temperature in air atmosphere
Keywords:
ReBa2Cu3O7-x single crystals, doping, oxygen diffusion kinetics, structural relaxation processes, single file diffusion
Abstract
The time dependencies of the resistivity of ReBa2Cu3O7-x (Re=Y, Ho) single crystals with varying degree of deviation from oxygen stoichiometry was investigated. It was found that the accelerated transport of oxygen ions in the initial stage of the implementation process can be carried out along the one-dimensional non-stoichiometric vacancies’ clusters in single file diffusion regime. The final stage of oxygen ions diffusion in ReBa2Cu3O7-x (Re=Y,Ho) is described by the usual classical diffusion mechanism.
The substitution of yttrium by holmium significantly affects the charge redistribution and changes the efficient interaction of ions in CuO-planes, thereby modifying the diffusion mass transfer mechanisms in the oxygen subsystem. Thus there is a change in the duration of the time intervals, corresponding to the oxygen ions’ single file and classical volume diffusion mechanisms.
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Vovk R.V., Vovk N.R., Dobrovolskiy O.V. / J. Low Temp. Phys, v. 175, p. 614–630, 2014.
V.M. Apalkov and M.E. Portnoi, Phys. Rev. B 65, 125310 (2002).
Ruslan V. Vovk, Georgij Ya. Khadzhai, Oleksandr V. Dobrovolskiy / Appl. Phys. A (2014) 117: 997-1002 DOI: 10.1007/s00339-014-8670-2.
N. Adamenko,K.E.Nemchenko,V. I.Tsyganok and A.I.Chervanev, Low Temp. Phys. 20 (1994) 498.
R.V.Vovk, C.D.H.Williams and A.F.G.Wyatt. / Phys. Rev. B 68, 134508 (2003).
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P.G. Curran, V.V. Khotkevych, S.J. Bending, A.S. Gibbs, S.L. Lee, and A.P. Mackenzie, Phys. Rev. B 84, 104507 (2011).
R.V.Vovk, M.A.Obolenskii, А.V.Bondarenko / Fizika Nizkih Temperatur, v.33, N1, p.126-130 (2007).
Published
2017-01-23
How to Cite
Boyko, Y. I., Bogdanov, V. V., Markov, R. D., & Vovk, R. V. (2017). Peculiarities of the relaxation processes in ReBa2Cu3O7-x (Re = Y, Ho) single crystals at room temperature in air atmosphere. Journal of V. N. Karazin Kharkiv National University. Series Physics, (25), 43-47. Retrieved from https://periodicals.karazin.ua/physics/article/view/9214
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