ANISOTROPY OF SUPERCONDUCTIVITY IN AN UNTWINNED YBA2CU3O7 SINGLE-CRYSTAL

Authors
ISHIDA T INOUE K OKUDA K ASAOKA H KAZUMATA Y NODA K TAKEI II
Citation
T. Ishida et al., ANISOTROPY OF SUPERCONDUCTIVITY IN AN UNTWINNED YBA2CU3O7 SINGLE-CRYSTAL, Physica. C, Superconductivity, 263(1-4), 1996, pp. 260-263
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
263
Issue
1-4
Year of publication
1996
Pages
260 - 263
Database
ISI
SICI code
0921-4534(1996)263:1-4<260:AOSIAU>2.0.ZU;2-X
Abstract
The torque curves of a detwinned YBa2Cu3O7 single crystal are reversib le under mu(0)H = 0.8 T and T = 90 K for the three different rotation axes. The effective mass model of the torque gives the anisotropy para meters as gamma(ca) = root m(c)/m(a) = 7.55 +/- 0.63 and gamma(cb) = r oot m(c)/m(b) = 8.95 +/- 0.76. The a-b anisotropy parameter can be obt ained as gamma(ab) = root m(a)/m(b) = gamma(cb)/gamma(ca) = 1.18 +/- 0 .14. The torque curve in the a-b-plane contains four-fold symmetry.