Glassy behavior of low-temperature energy relaxation in YBa sub 2 Cu sub 3 O sub 7 and YBa sub 2 Cu sub 3 O sub 6

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00682752· OSTI ID:6000948

Sahling, A; Sahling, S ^[1]

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1. Joint Institute for Nuclear Research, Moscow (USSR)

Measuring the power release {dot Q} after rapid cooling a YBa{sub 2}Cu{sub 3}O{sub 7} sample (m = 42.85 g, {Tc} = 91 K) from the equilibrium temperature T{sub 1} (2.35 K {le} T{sub 1} {le} 15.1 K) to T{sub 0} = 1.5 K, the authors observed a time dependence typical of a glass: {dot Q} is proportional to t{sup {minus}1}. The results allow them to determine the linear term of the heat capacity (0.8 mJ/mole {center dot} K{sup 2}) due to the two-level systems. While the low-temperature heat capacity anomaly noticeably decreases, the power release is essentially unchanged after oxygen reduction of the sample.

• OSTI ID: 6000948
• Journal Information: Journal of Low Temperature Physics; (USA), Journal Name: Journal of Low Temperature Physics; (USA) Vol. 77:5-6; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALORIMETRY
CHALCOGENIDES
CHEMICAL REACTIONS
COOLING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELEMENTS
ENERGY TRANSFER
GLASS
MATHEMATICAL MODELS
NONMETALS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
REDUCTION
RELAXATION
RELAXATION TIME
SPECIFIC HEAT
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES