Frequency independence of the vortex-glass transition in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] thin films

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.1337· OSTI ID:6489475

Deak, J; McElfresh, M ^[1]; Muenchausen, R; Foltyn, S; Dye, R ^[2]

---

1. Physics Department, Purdue University, West Lafayette, Indiana 47907 (United States)
2. STC, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

The frequency dependence of the vortex-glass phase transition in a YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] thin film was measured at frequencies ranging from 10[sup [minus]1] to 10[sup 5] Hz in applied fields [ital H] ranging from 0 to 50 kOe. The transition temperature [ital T][sub [ital g]] and the critical scaling parameter [nu]([ital z][minus]1) were determined from the scaling of both current-voltage characteristics and the resistivity measurements. The critical scaling parameters determined by different methods are found to agree [[nu]([ital z][minus]1)=7.2[plus minus]0.3] and are consistent with the predictions of the continuous vortex-glass phase transition described by Fisher, Fisher, and Huse [Phys. Rev. B 43, 130 (1991)]. No frequency dependence is observed for the vortex-glass transition temperature [ital T][sub [ital g]], for the range of parameters studied here. While the data do provide further support for the existence of a continuous vortex-glass phase transition, no evidence for the divergent time scale is observed, setting an upper limit of 10[sup [minus]5] sec for this time scale at ([ital T][minus][ital T][sub [ital g]])/[ital T][sub [ital g]][approx]0.02. Since ac-susceptibility data do not actually measure the irreversibility line'' (IRL), these results provide a fundamental measurement of the frequency dependence of the IRL. The observed frequency dependence is inconsistent with the flux-creep-based picture of the IRL.

• DOE Contract Number: FG02-90ER45427
• OSTI ID: 6489475
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:2; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
FILMS
FREQUENCY DEPENDENCE
FREQUENCY RANGE
HIGH-TC SUPERCONDUCTORS
HZ RANGE
KHZ RANGE
KHZ RANGE 01-100
MAGNETIC FLUX
MILLI HZ RANGE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES