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Title: Anisotropic Nonmonotonic Behavior of the Superconducting Critical Current in Thin YBa2Cu3O7-δ Films on Vicinal SrTiO3 Surfaces

Abstract

The critical current density of epitaxial YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) films grown on vicinal SrTiO{sub 3} substrates was investigated by electrical transport measurements along and across the steps of the SrTiO{sub 3} surface for a range of temperatures of 10 to 85 K and in applied magnetic fields varying from 0 to 14 T. For vicinal angles of 4{sup o} and 8{sup o}, we found evidence of enhanced pinning in the longitudinal direction at low magnetic fields for a wide region of temperatures and attribute this phenomenon to antiphase boundaries in the YBCO film. The transverse J{sub c} data showed a peak in the J{sub c}(H) curve at low magnetic fields, which was explained on the basis of magnetic interaction between Abrikosov and Abrikosov-Josephson vortices. The in-plane J{sub c} anisotropy observed for vicinal angles of 0.4{sup o} was reversed with respect to the 8{sup o} and 4{sup o} samples. This phenomenon was interpreted on the basis of strain induced in the YBCO film by the stepped substrate's surface.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1003375
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 71; Journal Issue: 5; Journal ID: ISSN 1098--0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; CRITICAL CURRENT; MAGNETIC FIELDS; STRAINS; SUBSTRATES; TRANSPORT; VORTICES

Citation Formats

Cantoni, Claudia, Verebelyi, Darren, Specht, Eliot D, Budai, John D, and Christen, David K. Anisotropic Nonmonotonic Behavior of the Superconducting Critical Current in Thin YBa2Cu3O7-δ Films on Vicinal SrTiO3 Surfaces. United States: N. p., 2005. Web. doi:10.1103/PhysRevB.71.054509.
Cantoni, Claudia, Verebelyi, Darren, Specht, Eliot D, Budai, John D, & Christen, David K. Anisotropic Nonmonotonic Behavior of the Superconducting Critical Current in Thin YBa2Cu3O7-δ Films on Vicinal SrTiO3 Surfaces. United States. https://doi.org/10.1103/PhysRevB.71.054509
Cantoni, Claudia, Verebelyi, Darren, Specht, Eliot D, Budai, John D, and Christen, David K. 2005. "Anisotropic Nonmonotonic Behavior of the Superconducting Critical Current in Thin YBa2Cu3O7-δ Films on Vicinal SrTiO3 Surfaces". United States. https://doi.org/10.1103/PhysRevB.71.054509.
@article{osti_1003375,
title = {Anisotropic Nonmonotonic Behavior of the Superconducting Critical Current in Thin YBa2Cu3O7-δ Films on Vicinal SrTiO3 Surfaces},
author = {Cantoni, Claudia and Verebelyi, Darren and Specht, Eliot D and Budai, John D and Christen, David K},
abstractNote = {The critical current density of epitaxial YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) films grown on vicinal SrTiO{sub 3} substrates was investigated by electrical transport measurements along and across the steps of the SrTiO{sub 3} surface for a range of temperatures of 10 to 85 K and in applied magnetic fields varying from 0 to 14 T. For vicinal angles of 4{sup o} and 8{sup o}, we found evidence of enhanced pinning in the longitudinal direction at low magnetic fields for a wide region of temperatures and attribute this phenomenon to antiphase boundaries in the YBCO film. The transverse J{sub c} data showed a peak in the J{sub c}(H) curve at low magnetic fields, which was explained on the basis of magnetic interaction between Abrikosov and Abrikosov-Josephson vortices. The in-plane J{sub c} anisotropy observed for vicinal angles of 0.4{sup o} was reversed with respect to the 8{sup o} and 4{sup o} samples. This phenomenon was interpreted on the basis of strain induced in the YBCO film by the stepped substrate's surface.},
doi = {10.1103/PhysRevB.71.054509},
url = {https://www.osti.gov/biblio/1003375}, journal = {Physical Review B},
issn = {1098--0121},
number = 5,
volume = 71,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2005},
month = {Sat Jan 01 00:00:00 EST 2005}
}