Current decay from quantum tunneling of vortices in Bi-2212 superconductors

J. R. Thompson; J. G. Ossandon; L. Krusin-Elbaum; K. J. Song; H. J. Kim; D. K. Christen; J. L. Ullmann

doi:10.1016/S0921-4534(00)00165-9

Current decay from quantum tunneling of vortices in Bi-2212 superconductors

J. R. Thompson^*
, J. G. Ossandon
, L. Krusin-Elbaum
, K. J. Song
, H. J. Kim
, D. K. Christen
, J. L. Ullmann

^*Corresponding author for this work

Physics Education

Oak Ridge National Laboratory
University of Tennessee
Universidad de Talca
IBM
Los Alamos National Laboratory

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

We have created randomly oriented columnar defects in textured Bi₂Sr₂CaCu₂O_x/Ag superconducting tapes and Tl-2212 materials, using a fission process driven by irradiation with 0.8 GeV protons. Vortex pinning was significantly improved, leading to increased persistent current density J. The thermally activated decay of current with time was greatly decreased, compared with unirradiated materials. Nonetheless, temperature-independent vortex motion from quantum tunneling limits J and its stability in time. Analysis of the time-dependent studies provides estimates for the elementary vortex attempt time τ, for both as-formed and ion-processed materials.

Original language	English
Pages (from-to)	170-174
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	335
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00165-9
State	Published - 2000.06
Event	9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn Duration: 1999.10.13 → 1999.10.15

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title = "Current decay from quantum tunneling of vortices in Bi-2212 superconductors",

abstract = "We have created randomly oriented columnar defects in textured Bi2Sr2CaCu2Ox/Ag superconducting tapes and Tl-2212 materials, using a fission process driven by irradiation with 0.8 GeV protons. Vortex pinning was significantly improved, leading to increased persistent current density J. The thermally activated decay of current with time was greatly decreased, compared with unirradiated materials. Nonetheless, temperature-independent vortex motion from quantum tunneling limits J and its stability in time. Analysis of the time-dependent studies provides estimates for the elementary vortex attempt time τ, for both as-formed and ion-processed materials.",

author = "Thompson, \{J. R.\} and Ossandon, \{J. G.\} and L. Krusin-Elbaum and Song, \{K. J.\} and Kim, \{H. J.\} and Christen, \{D. K.\} and Ullmann, \{J. L.\}",

year = "2000",

month = jun,

doi = "10.1016/S0921-4534(00)00165-9",

language = "English",

volume = "335",

pages = "170--174",

journal = "Physica C: Superconductivity and its Applications",

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note = "9th Japan-US Workshop on High-Tc Superconductors ; Conference date: 13-10-1999 Through 15-10-1999",

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TY - JOUR

T1 - Current decay from quantum tunneling of vortices in Bi-2212 superconductors

AU - Thompson, J. R.

AU - Ossandon, J. G.

AU - Krusin-Elbaum, L.

AU - Song, K. J.

AU - Kim, H. J.

AU - Christen, D. K.

AU - Ullmann, J. L.

PY - 2000/6

Y1 - 2000/6

N2 - We have created randomly oriented columnar defects in textured Bi2Sr2CaCu2Ox/Ag superconducting tapes and Tl-2212 materials, using a fission process driven by irradiation with 0.8 GeV protons. Vortex pinning was significantly improved, leading to increased persistent current density J. The thermally activated decay of current with time was greatly decreased, compared with unirradiated materials. Nonetheless, temperature-independent vortex motion from quantum tunneling limits J and its stability in time. Analysis of the time-dependent studies provides estimates for the elementary vortex attempt time τ, for both as-formed and ion-processed materials.

AB - We have created randomly oriented columnar defects in textured Bi2Sr2CaCu2Ox/Ag superconducting tapes and Tl-2212 materials, using a fission process driven by irradiation with 0.8 GeV protons. Vortex pinning was significantly improved, leading to increased persistent current density J. The thermally activated decay of current with time was greatly decreased, compared with unirradiated materials. Nonetheless, temperature-independent vortex motion from quantum tunneling limits J and its stability in time. Analysis of the time-dependent studies provides estimates for the elementary vortex attempt time τ, for both as-formed and ion-processed materials.

UR - https://www.scopus.com/pages/publications/0033705118

U2 - 10.1016/S0921-4534(00)00165-9

DO - 10.1016/S0921-4534(00)00165-9

M3 - Conference article

AN - SCOPUS:0033705118

SN - 0921-4534

VL - 335

SP - 170

EP - 174

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1

T2 - 9th Japan-US Workshop on High-Tc Superconductors

Y2 - 13 October 1999 through 15 October 1999

ER -

Current decay from quantum tunneling of vortices in Bi-2212 superconductors

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