Effects of Co substitution on the superconducting properties of GaSr2(Tm,Ca)Cu2Oz cuprate
Creators
- 1. Korea Basic Science Institute, Chuncheon Center, Chuncheon (Korea, Republic of)
- 2. Kangwon National University, Chuncheon (Korea, Republic of)
Description
We have investigated the effects of Co substitution for Ga on the structural and the superconducting properties of (Ga1-yCoy)Sr2(Tm1-xCax)Cu2Oz (x = 0.25, 0.3; 0 ≤ y ≤ 0.6) prepared under ambient pressure. Partial substitution of Co for Ga is found not only to improve the phase purity of the sample but also to induce superconductivity in GaSr2(Tm1-xCax)Cu2Oz. On progressive replacement of Ga by Co at a fixed Ca content, the room-temperature thermoelectric power decreases at first and then increases at higher Co-doping content, indicating that the carrier concentration on the superconducting planes is sensitive to the substitution of Co for Ga. The superconducting behavior of the Co-substituted samples is discussed in connection with the structural properties and the oxygen contents of the samples.
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Physical Society
- Journal Volume
- 48
- Journal Issue
- 4
- Series
- 28 refs, 5 figs
- Journal Page Range
- p. 594-598
- ISSN
- 0374-4884
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 42074664
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- CALCIUM; COBALT; CRYSTAL DOPING; CUPRATES; GALLIUM COMPOUNDS; IMPURITIES; MATERIAL SUBSTITUTION; OXIDES; PHYSICAL PROPERTIES; SUPERCONDUCTING COMPOSITES; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METALS; CHALCOGENIDES; COHERENT SCATTERING; COMPOSITE MATERIALS; COPPER COMPOUNDS; DIFFRACTION; ELEMENTS; MATERIALS; METALS; OXYGEN COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS