Superconductivity of YBa2Cu3-xMxOy (M = Co, Fe, Ni, Zn)
- 1 December 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (12A), L2087
- https://doi.org/10.1143/jjap.26.l2087
Abstract
The superconductivity of YBa2Cu3-x M x O y , (M = Co, Fe, Ni, Zn; x = 0.1-0.4) was examined by means of ac susceptibility measurements. The results indicated that Cu in the Cu2 site (between the Y and the BaO layer) plays a more substantial role in superconductivity than that in the Cu1 site (between the BaO layers). Combining this with our earlier results for the La1+x Ba2-x Cu3O y system, we suggest that holes doped mainly in the O 2p orbitals of the rock-salt-type BaO layers form Cooper pairs through some medium (spin fluctuations or possibly other collective modes) excited in the Cu2 layer.Keywords
This publication has 9 references indexed in Scilit:
- Superconducting EuBa2Cu3O7. A Mössbauer studyZeitschrift für Physik B Condensed Matter, 1987
- Superconductivity of Y1Ba2(Cu1-xFex)3OyJapanese Journal of Applied Physics, 1987
- Superconductivity of La1+xBa2-xCu3Oy System: Which Layers are Doped with Carriers?Japanese Journal of Applied Physics, 1987
- Substitution for copper in a high-Tc superconductor YBa2Cu3O7–δNature, 1987
- Antiferromagnetism, localization, and pairing in a two-dimensional model forPhysical Review Letters, 1987
- Crystal Structure of the Orthorhombic Form of Ba2YCu3O7-x at 42 KJapanese Journal of Applied Physics, 1987
- High Tc Superconductor YBa2Cu3Oy–Oxygen Content vs Tc Relation–Japanese Journal of Applied Physics, 1987
- Theory of high-superconductivity in oxidesPhysical Review Letters, 1987
- The thermodynamics of cation distributions in simple spinelsJournal of Inorganic and Nuclear Chemistry, 1967