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Electro-transport and structure of 1-2-3 HTSC single crystals with different plane defects topologies

  • R. V. Vovk
  • M. A. Obolenskii
  • Z. F. Nazyrov
  • I. L. Goulatis
  • A. Chroneos
  • V. M. Pinto Simoes
Article

Abstract

In this work we study the structural and resistivity parameters of the 1-2-3 system HTSC single crystals by substituting yttrium to holmium and with a low (5%) aluminum doping. It was determined that in the case of non-stoichiometric samples, the structure of crystals, directly after the solution-melt growth, is close to tetragonal. In the process of additional oxygen saturation we observed a ferroelastic transition to orthorhombic phase, accompanied by the formation of a domain twin structure. The twin boundaries and the aluminum impurities are efficient scattering centers of normal carriers. At aluminum concentration y ≤ 0.5 the tweed structure is not formed.

Keywords

Twin Boundary Holmium High Critical Temperature Tweed Structure Aluminum Impurity 
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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • R. V. Vovk
    • 1
  • M. A. Obolenskii
    • 1
  • Z. F. Nazyrov
    • 1
  • I. L. Goulatis
    • 1
  • A. Chroneos
    • 2
  • V. M. Pinto Simoes
    • 3
  1. 1.Kharkov National UniversityKharkovUkraine
  2. 2.Department of MaterialsImperial CollegeLondonUnited Kingdom
  3. 3.IPA_Instituto Superior Autónomo de Estudos PolitécnicosLisbonPortugal

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