Detection of Oxygen Deficient Regions in YBa2Cu3Ox Superconductors by Polarized Optical Microscopy
- 1 May 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (5A) , L796
- https://doi.org/10.1143/jjap.30.l796
Abstract
We have found that oxygen deficient regions in YBa2Cu3O x superconductors exhibit different colors from that of the matrix under polarized light. When oxygen annealing was insufficient, large melt-grown YBaCuO crystals occasionally contained narrow bands exhibiting different colors where the twin structure was absent. Upon annealing in oxygen atmosphere, these banded regions disappeared, indicating that these regions are oxygen deficient. Raman spectroscopy measurements also confirmed that such regions are oxygen deficient.Keywords
This publication has 5 references indexed in Scilit:
- Frequency- and temperature-dependent conductivity in crystalsPhysical Review B, 1990
- Oxygen-defect flux pinning, anomalous magnetization and intra-grain granularity in YBa2Cu307–δNature, 1990
- Critical currents and flux creep in melt processed high Tc oxide superconductorsCryogenics, 1990
- Lattice vibrations in high-Tc superconductors: Optical spectroscopy and lattice dynamicsPhysica C: Superconductivity and its Applications, 1989
- Determination of Oxygen Nonstoichiometry in a High-Tc Superconductor Ba2YCu3O7-δJapanese Journal of Applied Physics, 1987