Uniaxial pressure dependence of [ital T][sub [ital c]] from high-resolution dilatometry of untwinned La[sub 2[minus][ital x]]Sr[sub [ital x]]CuO[sub 4] single crystals

Journal Article · Sun May 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.13137· OSTI ID:6715715

Gugenberger, F; Meingast, C; Roth, G; Grube, K; Breit, V; Weber, T; Wuehl, H ^[1]; Uchida, S; Nakamura, Y ^[2]

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1. Institut fuer Nukleare Festkoerperphysik and Institut fuer Technische Physik, Kernforschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe (Germany)
2. Superconductor Research Course and Department of Applied Physics, University of Tokyo, Bunkyo-Ku, Tokyo 113 (Japan)

We have carried out high-resolution dilatometry experiments on a series of high-quality single crystals of La[sub 2[minus][ital x]]Sr[sub [ital x]]CuO[sub 4] with various Sr content on both the under- and overdoped side of the [ital T][sub [ital c]]([ital x]) phase diagram. A simple [ital in] [ital situ] technique was applied to prevent the usual twinning of the samples in the low-temperature orthorhombic (LTO) phase, which allows us to study the full anisotropy of the thermal expansion of the LTO phase. From the anomalies in the linear expansivities [Delta][alpha][sub [ital i]] ([ital i]=[ital a],[ital b],[ital c]) at [ital T][sub [ital c]] we deduce all three uniaxial stress ([ital dT][sub [ital c]]/[ital dp][sub [ital i]]) and strain ([ital dT][sub [ital c]]/[ital d][var epsilon][sub [ital i]]) dependences, which turn out to be large and almost cancel for hydrostatic pressure.

• OSTI ID: 6715715
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 49:18; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CUPRATES
THERMAL EXPANSION
LANTHANUM OXIDES
STRONTIUM OXIDES
ANISOTROPY
HIGH PRESSURE
MONOCRYSTALS
ORTHORHOMBIC LATTICES
PRESSURE DEPENDENCE
STOICHIOMETRY
STRAINS
STRESSES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSITION TEMPERATURE
TWINNING
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
EXPANSION
LANTHANUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360204 - Ceramics
Cermets
& Refractories- Physical Properties