Structural relaxation of НоBa2Cu3O7-δ single-crystals with a reduced oxygen content in the process of application and removal of hydrostatic pressure

  • S. V. Savich V.N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61022, Ukraine
  • Yu. I. Boyko V.N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61022, Ukraine
  • G. Ya. Khadzhay V.N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61022, Ukraine
  • M. G. Revyakina V.N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61022, Ukraine
  • R. V. Vovk V.N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61022, Ukraine
  • O. Ye. Avramchuk S.P. Korolova Zhitomir Military Institute Zhitomir, Ukraine
  • Jacek Gralewski Zakład Podstaw Techniki i Ekologii Przemysłowej Politechnika Łódzka ul. Piotrkowska 266 90-924 Łódź, Rzeczpospolita Polska
Keywords: single-crystal HTSS, structural relaxation, diff use coalescence, vacancies, oxygen clusters, single-file diffusion, fluctuation conductivity

Abstract

The influence of hydrostatic pressure (P = 0, 4.8 kbar) on the electron conduction characteristics and structural relaxation of the НоBa2Cu3O7-δ single-crystal with a reduced oxygen content (δ≈0.35) is investigated. The formation of two superconducting phases with Tc1 and Tc2 is associated with the redistribution of labile oxygen in the volume of the sample under pressure by the mechanism of a diff use coalescence of vacancies. Temperature dependences of the resistance in the Tc-300K range are analyzed by the Bloch-Gruneisen model, while Tc (T > Tc) interval is analyzed by the Aslamazov-Larkin 3D model for the fl uctuation conductivity.

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Published
2018-06-02
How to Cite
Savich, S. V., Boyko, Y. I., Khadzhay, G. Y., Revyakina, M. G., Vovk, R. V., Avramchuk, O. Y., & Gralewski, J. (2018). Structural relaxation of НоBa2Cu3O7-δ single-crystals with a reduced oxygen content in the process of application and removal of hydrostatic pressure. Journal of V. N. Karazin Kharkiv National University. Series Physics, (27), 59-67. Retrieved from https://periodicals.karazin.ua/physics/article/view/10996
Issue
No. 27 (2017): Journal of V.N. Karazin Kharkiv National University, series "Physics"
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Articles