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Order of the fundamental vortex transformation in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]

Journal Article · · Physical Review, B: Condensed Matter; (United States)
 [1]; ; ; ;  [2]
  1. Physics Department, Case Western Reserve University, Cleveland, Ohio 44106 (United States)
  2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
+ Show Author Affiliations

In high-[ital T][sub [ital c]] materials with low levels of static disorder, a small magnetization jump is thought to occur at the vortex solid to vortex liquid transformation. Using a null technique, the temperature dependence of the magnetization of an untwinned single crystal of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] has been investigated. No jump could be detected at the transformation, the data establishing an upper bound that is 1% of the value anticipated theoretically for a first-order melting transition. Residual disorder in the particular crystal used may have suppressed the jump to some extent. However, the result indicates that the first-order character of the fundamental transformation is likely to be weaker than anticipated.

DOE Contract Number:
W-31109-ENG-38
OSTI ID:
6401285
Journal Information:
Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:14; ISSN PRBMDO; ISSN 0163-1829
Country of Publication:
United States
Language:
English

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Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOY SYSTEMS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETIZATION
MELTING POINTS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUATERNARY ALLOY SYSTEMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES