Determination of the Orthorhombic-Tetragonal YBa2Cu3O7-δ Phase Boundary in the δ-T Diagram
Authors:
- Yoshimi KuboYKYoshimi Kubo
- Yukinobu NakabayashiYNYukinobu Nakabayashi
- Junji TabuchiJTJunji Tabuchi
- Tsutomu YoshitakeTYTsutomu Yoshitake
- Atsushi OchiAOAtsushi Ochi
- Kazuaki UtsumiKUKazuaki Utsumi
- Hitoshi IgarashiHIHitoshi Igarashi
- Masatomo YonezawaMYMasatomo Yonezawa
- 1 November 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (11A) , L1888
Abstract
The orthorhombic-tetragonal YBa2Cu3O7-δ phase boundary in the δ-T diagram was determined by a detailed isobar TG measurement under the oxygen partial pressures of 1 to 0.01 atm. The phase boundary was found not to be located at δ = const., but to have a slope of dδ/dT∼-4.7×10-4 K-1. The experimental results are discussed with a simple order-disorder transformation model of oxygen atoms on the Cu plane sandwiched by Ba planes.Keywords
This publication has 8 references indexed in Scilit:
- Structure of the single-phase high-temperature superconductor YBa2Cu3O7−δApplied Physics Letters, 1987
- Determination of Oxygen Nonstoichiometry in a High-Tc Superconductor Ba2YCu3O7-δJapanese Journal of Applied Physics, 1987
- High Tc Superconductor YBa2Cu3Oy–Oxygen Content vs Tc Relation–Japanese Journal of Applied Physics, 1987
- Crystal Structure of the Tetragonal Form of Ba2YCu3O7-xJapanese Journal of Applied Physics, 1987
- The Dependence of the Superconducting Transition upon the Quench Temperature of YBa2Cu3OyJapanese Journal of Applied Physics, 1987
- Effect of Oxygen Deficiency on the Crystal Structure and Superconducting Properties of the Ba2YCu3OyJapanese Journal of Applied Physics, 1987
- Rietveld Refinement of the Structure of Ba2YCu3O7-x with Neutron Powder Diffraction DataJapanese Journal of Applied Physics, 1987
- Bulk superconductivity at 91 K in single-phase oxygen-deficient perovskitePhysical Review Letters, 1987