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Title: Vortex dynamics in YBa 2Cu 3O 7-δ with in-plane columnar defects introduced by irradiation

Abstract

We report on the effects of introducing columnar defects by irradiation in clean single crystals of YBa 2Cu 3O 7-δ in a direction parallel to the ab-plane. The defects were introduced by bombarding the samples with Pb- 208 56+ ions at an energy of 1.4 GeV. We find that the defects suppress the first order melting transition for magnetic fields aligned parallel or at small angles relative to the defects. The columnar defects inhibit vortex motion of vortices parallel to the defects, while the vortices experience less pinning when they are perpendicular to the defects. Lastly, our results suggest that the pinning anisotropy is increased, at least for magnetic fields up to the matching field dose of 1 T.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1357569
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physica. C, Superconductivity; Journal Volume: 505
Country of Publication:
United States
Language:
English
Subject:
YBa2Cu3O7−δ; Columnar defects; Vortex dynamics; Pinning anisotropy

Citation Formats

Petrean, Andra, Paulius, Lisa, Tobos, Valentina, Cronk, Heather, and Kwok, Wai-Kwong. Vortex dynamics in YBa2Cu3O7-δ with in-plane columnar defects introduced by irradiation. United States: N. p., 2014. Web. doi:10.1016/j.physc.2014.07.006.
Petrean, Andra, Paulius, Lisa, Tobos, Valentina, Cronk, Heather, & Kwok, Wai-Kwong. Vortex dynamics in YBa2Cu3O7-δ with in-plane columnar defects introduced by irradiation. United States. doi:10.1016/j.physc.2014.07.006.
Petrean, Andra, Paulius, Lisa, Tobos, Valentina, Cronk, Heather, and Kwok, Wai-Kwong. Thu . "Vortex dynamics in YBa2Cu3O7-δ with in-plane columnar defects introduced by irradiation". United States. doi:10.1016/j.physc.2014.07.006.
@article{osti_1357569,
title = {Vortex dynamics in YBa2Cu3O7-δ with in-plane columnar defects introduced by irradiation},
author = {Petrean, Andra and Paulius, Lisa and Tobos, Valentina and Cronk, Heather and Kwok, Wai-Kwong},
abstractNote = {We report on the effects of introducing columnar defects by irradiation in clean single crystals of YBa2Cu3O7-δ in a direction parallel to the ab-plane. The defects were introduced by bombarding the samples with Pb-20856+ ions at an energy of 1.4 GeV. We find that the defects suppress the first order melting transition for magnetic fields aligned parallel or at small angles relative to the defects. The columnar defects inhibit vortex motion of vortices parallel to the defects, while the vortices experience less pinning when they are perpendicular to the defects. Lastly, our results suggest that the pinning anisotropy is increased, at least for magnetic fields up to the matching field dose of 1 T.},
doi = {10.1016/j.physc.2014.07.006},
journal = {Physica. C, Superconductivity},
number = ,
volume = 505,
place = {United States},
year = {Thu Jul 24 00:00:00 EDT 2014},
month = {Thu Jul 24 00:00:00 EDT 2014}
}