Published March 1, 2005 | Version v1
Journal article Metadata-only

Higher harmonics of ac voltage response in narrow strips of YBa2Cu3O7 thin films: evidence for strong thermal fluctuations

Creators

  • 1. Department of Engineering Sciences, Universidad de Talca, Curico (Chile)
  • 2. Abteilung Supraleitung und Magnetismus, Universitaet Leipzig, Linnestrasse 5, D-04103 Leipzig (Germany)

Description

We report on measurements of higher harmonics of the ac voltage response in strips of YBa2Cu3O7-δ thin films as a function of temperature, frequency and ac current amplitude. The third (fifth) harmonic of the local voltage is found to exhibit a negative (positive) peak at the superconducting transition temperature and their amplitudes are closely related to the slope (derivative) of the first (ohmic) harmonic. The peaks practically do not depend on frequency and no even (second or fourth) harmonics are detected. The observed data can be interpreted in terms of ac current induced thermal modulation of the sample temperature added to strong thermally activated fluctuations in the transition region

Availability note (English)

Available online at http://stacks.iop.org/0953-2048/18/325/sust5_3_020.pdf or at the Web site for the journal Superconductor Science and Technology (ISSN 1361-6668) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0953-2048/18/325/sust5_3_020.pdf; http://www.iop.org/;
DOI
10.1088/0953-2048/18/3/020;
PII
S0953-2048(05)86045-2;

Publishing Information

Journal Title
Superconductor Science and Technology
Journal Volume
18
Journal Issue
3
Journal Page Range
p. 325-329
ISSN
0953-2048
CODEN
SUSTEF

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36039542
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
AMPLITUDES; BARIUM COMPOUNDS; CUPRATES; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; FLUCTUATIONS; FREQUENCY DEPENDENCE; HARMONICS; MODULATION; SUPERCONDUCTING FILMS; TEMPERATURE DEPENDENCE; THIN FILMS; TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; COPPER COMPOUNDS; CURRENTS; FILMS; OSCILLATIONS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; VARIATIONS