Journal article
Lower critical fields in an ellipsoid-shaped YBa2Cu3O6.95 single crystal
Abstract
The lower critical fields of YBa2Cu3O6.95 have been determined by magnetization M(H) measurements using an ellipsoidal-shaped crystal and a thin platelet for H∥c and H⊥c, respectively. Careful data analysis rules out the effects of surface barriers. The data show a linear temperature dependence of Hc1 below about 0.5Tc, with Hc1(0)=1100 Oe and 200 Oe for H∥c and H⊥c, respectively. The anisotropy factor γ is almost temperature independent and …
Authors
Liang R; Dosanjh P; Bonn DA; Hardy WN; Berlinsky AJ
Journal
Physical Review B, Vol. 50, No. 6, pp. 4212–4215
Publisher
American Physical Society (APS)
Publication Date
August 1, 1994
DOI
10.1103/physrevb.50.4212
ISSN
2469-9950