Investigations of the zero-field (a,b)-plane conductivity of YBa2Cu3O7-d near the critical temperature
Crisan, A., Gordeev, S.N., Manton, S., Rassau, A.P., Popa, S., Beduz, C., De Groot, P.A.J., Gagnon, R. and Taillefer, L. (1998) Investigations of the zero-field (a,b)-plane conductivity of YBa2Cu3O7-d near the critical temperature. Physica C: Superconductivity, 309, (1-2), 1-7. (doi:10.1016/S0921-4534(98)00578-4).
Download
Full text not available from this repository.
Description/Abstract
The resistive transition R(T) and the current–voltage characteristics (I–V) in the range 10−9–10−6 V and close to the critical temperature (Tc) were measured in a single-grain of melt-textured YBa2Cu3O7−δ (YBCO) and in a detwinned YBCO single-crystal, with the transport current parallel to the (a,b) planes and in zero external magnetic field using a SQUID picovoltmeter. In the case of the melt-textured sample, we measured the I–V curves also at higher levels of dissipation. For T<Tc, we interpreted the lower part of the I–V curves in the framework of the Jensen–Minnhagen model of current-induced unbinding of thermally-created vortex–antivortex pairs, which leads to V∝I(I−Ic1)a−1. Our results confirm a recently proposed current–temperature (I–T) phase diagram by S.W. Pierson. In addition, we determined for the first time the dependence of the characteristic (unbinding) current Ic1 with t=1−T/Tc for temperatures very close to Tc and low transport currents.
| Item Type: | Article |
|---|---|
| ISSNs: | 0921-4534 (print) |
| Related URLs: | |
| Keywords: | YBCO, critical temperature, current, voltage |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| Item ID: | 21274 |
| Date Deposited: | 17 Nov 2006 |
| Last Modified: | 02 Mar 2012 11:25 |
| Contributors: | Crisan, A. (Author) Gordeev, S.N. (Author) Manton, S. (Author) Rassau, A.P. (Author) Popa, S. (Author) Beduz, C. (Author) De Groot, P.A.J. (Author) Gagnon, R. (Author) Taillefer, L. (Author) |
| Date: | 1998 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/21274 |
Actions (login required)
 |
View Item |
