Thermal conductivity of Zn, Pr and Tb doped YBCO single crystals: Theory and experiment
- Florida State Univ., Tallahassee, FL (United States); and others
The thermal conductivity K(T) vs temperature has been measured for (Y,Pr)Ba{sub 2}Cu{sub 3}O{sub 7}, (Y,Tb)Ba{sub 2}Cu{sub 3}O{sub 7} and YBa{sub 2}(Cu,Zn){sub 3}O{sub 7} single crystals from 10{le}T{le}280K. For YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO), a strong enhancement in K(T) is observed for T{le}T{sub c} with a peak in K(T) at approximately T{approx}T{sub c}/2 with a sharp change in slope of K(T) at T{sub c}. These results are similar to those reported previously. For the selectively doped YBCO, the peak in K(T) is shifted to lower temperatures and occurs at T{approx}20K independent of T{sub c} and the impurity concentration. In addition, the sharp change in slope of K(T) at T{sub c} is not apparent for the doped crystals. These results are discussed along with a theoretical model for electronic conduction including both impurity and inelastic scattering from spin fluctuations.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 136192
- Report Number(s):
- CONF-950144-; ISSN 0896-1107; TRN: 95:007193-0016
- Journal Information:
- Journal of Superconductivity, Vol. 8, Issue 4; Conference: University of Miami workshop on high-temperature superconductivity: physical properties and mechanisms, Coral Gables, FL (United States), 5-11 Jan 1995; Other Information: PBD: Aug 1995
- Country of Publication:
- United States
- Language:
- English
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