Temperature dependence of the anisotropic magnetic penetration depth and lower critical field of single-crystal Pb sub 2 Sr sub 2 (Y,Ca)Cu sub 3 O sub 8+. delta

Journal Article · Sun Sep 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.4539· OSTI ID:5293893

Reedyk, M; Stager, C V; Timusk, T ^[1]; Xue, J S; Greedan, J E ^[2]

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1. Department of Physics, McMaster University, Hamilton, Ontario (Canada)
2. Institute for Materials Research, McMaster University, Hamilton, Ontario (Canada)

The temperature dependence of the penetration depth of single-crystal Pb{sub 2}Sr{sub 2}(Y,Ca)Cu{sub 3}O{sub 8+{delta}} has been determined in the vicinity of {ital T}{sub {ital c}} ({similar to}75 K) using intermediate-field reversible-magnetization measurements. The {ital ab}-plane penetration depth in the restricted region near {ital T}{sub {ital c}} was found to follow clean-limit BCS behavior from which an estimate of 2575 A for {lambda}{sub {ital a}{ital b}}(0) was obtained. The effective-mass anisotropy parameter, {gamma}=({ital m}{sub {ital c}}/{ital m}{sub {ital a}{ital b}}){sup 1/2}, was found to be 2.5, which together with the former result yields a value of 6425 A for {lambda}{sub {ital c}}(0). In addition, the temperature dependence of the anisotropic lower critical field was determined from observations of the onset of deviation from perfect diamagnetism. The estimates obtained for the zero-temperature lower critical field, {ital H}{sub {ital c}1}(0), were 95{plus minus}10 G for {bold H}{perpendicular}{ital c} and 505{plus minus}20 G for {bold H}{parallel}{ital c}.

• OSTI ID: 5293893
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:9; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSOLUTE ZERO TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BCS THEORY
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
CRYSTALS
EFFECTIVE MASS
EQUATIONS
HIGH-TC SUPERCONDUCTORS
LEAD COMPOUNDS
LEAD OXIDES
LONDON EQUATION
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETIZATION
MASS
MINERALS
MONOCRYSTALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PEROVSKITE
PEROVSKITES
STOICHIOMETRY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES