Reversible magnetic properties of (La[sub 1[minus][ital x]]Sr[sub [ital x]])[sub 2]CuO[sub 4] single crystals with 0. 05[le][ital x][le]0. 10

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.11384· OSTI ID:6676557

Li, Q; Suenaga, M ^[1]; Kimura, T; Kishio, K ^[2]

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1. Division of Materials Sciences, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Department of Industrial Chemistry, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)

Systematic magnetization measurements were made to study reversible magnetic properties of a series of high-quality, large single crystals of (La[sub 1[minus][ital x]]Sr[sub [ital x]])[sub 2]CuO[sub 4] over a composition range of [ital x]=0.05--0.10, with magnetic fields parallel to the [ital c] axis. A method of data analysis, based on the variational model developed by Hao and Clem, was used for the determination of various superconducting parameters of this family. We fit the temperature dependence of the thermodynamic critical field [ital H][sub [ital c]]([ital T]) data, which was obtained in the temperature region where the thermodynamic fluctuation is insignificant, with the BCS or an empirical function for [ital H][sub [ital c]]([ital T]). We found that a crystal ([ital x]=0.077), which has the highest [ital T][sub [ital c]] ([congruent]35.0 K), shows a maximum in the value of [ital H][sub [ital c]](0) (=2510[plus minus]80 Oe) and a minimum in the value of [lambda][sub [ital a][ital b]](0) (=2545[plus minus]40 A) for the range of [ital x] that we have studied. We also observed rather close values of coherence length in the [ital ab] plane [[xi][sub [ital a][ital b]](0)[similar to]32 A] for all (La[sub 1[minus][ital x]]Sr[sub [ital x]])[sub 2]CuO[sub 4] single crystals that we studied.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6676557
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:17; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TRANSITION ELEMENT COMPOUNDS