Ac response of the vortex system in a Pr[sub 1. 85]Ce[sub 0. 15]CuO[sub 4[minus][ital y]] single crystal

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

DOI:https://doi.org/10.1103/PhysRevB.47.15250· OSTI ID:5429729

Fabrega, L; Fontcuberta, J; Pinol, S ^[1]; van der Beek, C J ^[2]; Kes, P H ^[2]

---

1. Consejo Nacional de Investigaciones (CSIC), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra (Spain)
2. Kamerlingh Onnes Laboratorium der Rijksuniversiteit Leiden, P.O. Box 9506, 2300 RA Leiden (Netherlands)

We have studied the field, frequency, and amplitude dependence of the ac susceptibility on a single crystal of the electron-doped superconductor Pr[sub 1.85]Ce[sub 0.15]CuO[sub 4[minus][ital y]]. We show that a thermally activated flux motion over effective energy barriers [ital U]([ital T],[ital H])=[ital U][sub 0](1[minus][ital T]/[ital T][sub [ital c]])[ital H][sup [minus]0.6], with [ital U][sub 0][approx]40 meV, can account for the dc-field and frequency effects. The amplitude dependence of the ac response in this superconducting system is discussed and it is argued that it is a signature of the critical state.

• OSTI ID: 5429729
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:22; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL CURRENT
CUPRATES
CURRENTS
ELECTRIC CURRENTS
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS