Orientational anisotropy of the upper critical field in single-crystal YBa/sub 2/Cu/sub 3/O/sub 7/ and Bi/sub 2. 2/CaSr/sub 1. 9/Cu/sub 2/O/sub 8+//sub x/

Journal Article · Mon Oct 31 23:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.9280· OSTI ID:6749256

Naughton, M J; Yu, R C; Davies, P K; Fischer, J E; Chamberlin, R V; Wang, Z Z; Jing, T W; Ong, N P; Chaikin, P M

We have measured the dependence of the upper critical magnetic field upon orientation for single-crystal samples of YBa/sub 2/Cu/sub 3/O/sub 7/ and Bi/sub 2.2/CaSr/sub 1.9/Cu/sub 2/O/sub 8+//sub x/ via four-probe resistance. We find continuous behavior of H/sub c//sub =/(theta) for small deviations from parallel orientation for the Y sample, as expected for an anisotropic, three-dimensional superconductor. For the Bi sample, however, our data are more consistent with a thin-film model, exhibiting a cusp at parallel orientation, suggesting that Bi/sub 2.2/CaSr/sub 1.9/Cu/sub 2/O/sub 8+//sub x/ is a quasi-two-dimensional system.

• Research Organization: Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
• OSTI ID: 6749256
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:13; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
CRYSTALS
DIMENSIONS
MAGNETIC FIELDS
MONOCRYSTALS
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES