Tetragonal High-Tc Superconductor in the System Ba2Y(Cu1-xGax)3O7-δ
- 1 December 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (12A) , L1997
- https://doi.org/10.1143/jjap.26.l1997
Abstract
We synthesized single-phase compounds in the system Ba2Y(Cu1-x Ga x )3O7-δ (x = 0.02, 0.05 and 0.1). They are orthorhombic but the difference between their a- and b-axis dimensions rapidly decreases with increasing x. The compound at x = 0.1 is almost tetragonal (b/a = 1.001), whereas its c-dimension remains nearly the same as that of orthorhombic Ba2YCu3O7-δ. The oxygen content in the compounds increases according to 7-δ=6.92+0.43x. T c decreases as the Ga content increases, but the effect is not crucial (66 K at x = 0.1). Incorporated Ga is likely to replace Cu on the la(0, 0, 0) site.Keywords
This publication has 16 references indexed in Scilit:
- Possibility of Superconductivity at 65°C in Sr-Ba-Y-Cu-O SystemJapanese Journal of Applied Physics, 1987
- Localized Electrons Around Cu Atoms of Superconductor, Tetragonal YBa2Cu3-xO7-yJapanese Journal of Applied Physics, 1987
- Local Structure in Orthorhombie and Tetragonal Ba2YCu3O7-y: The Role of Oxygen Vacancies for High Tc SuperconductivityJapanese Journal of Applied Physics, 1987
- Superconductivity at 155 KPhysical Review Letters, 1987
- Structure of the 100 K Superconductor Ba 2 YCu 3 O 7 between (5 ÷ 300) K by Neutron Powder DiffractionEurophysics Letters, 1987
- Neutron study of the crystal structure and vacancy distribution in the superconductorPhysical Review B, 1987
- Crystal Structure of the High Tc Superconductor YbBa2Cu3O7-δJapanese Journal of Applied Physics, 1987
- Preparation and Properties of Three Types of Orthorhombic Superconductor Ba2YCu3-xO7-yJapanese Journal of Applied Physics, 1987
- Structure and crystal chemistry of the high-Tc superconductor YBa2Cu3O7−xNature, 1987
- Sharp Superconductivity Transition at 94 K in HoBa2Cu3O7-δ and ErBa2Cu3O7-δJapanese Journal of Applied Physics, 1987