Phase separation in oxygen deficient HoBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Vovk, R. V.; Nazyrov, Z. F.; Obolenskii, M. A.; Goulatis, I. L.; Chroneos, A. and Pinto Simoes, V. M. (2011). Phase separation in oxygen deficient HoBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries. Philosophical Magazine, 91(17) pp. 2291–2302.

DOI: https://doi.org/10.1080/14786435.2011.552893

Abstract

We investigate the influence of high hydrostatic pressure on the electrical resistance in the ab-plane in HoBa₂Cu₃O_7-δ single crystals with oxygen deficiency. It is determined that the high-pressure-induced redistribution of labile oxygen enhances phase separation, which is accompanied by structural relaxation and ascending diffusion within the volume of the sample. This results in a significant displacement of the temperature intervals that correspond to metal-to-dielectric-type transitions. It is determined that the formation of the low-temperature phase can occur at the twin boundaries.

Viewing alternatives

Metrics

Item Actions

Export

You can export this page using these formats Digital Object Identifier - DOI

About

• Item ORO ID
• 35207
• Item Type
• Journal Item
• ISSN
• 1478-6443
• Keywords
• HoBaCuO single crystals; hydrostatic pressure; labile oxygen; pseudo-gap anomaly; metal-to-dielectric transition; twin boundaries
• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2011 Taylor & Francis
• Depositing User
• Alexander Chroneos