An ultrasonic study of magnetic flux pinning and the determination of the flux pinning energy in YBa2Cu3O7-δ

A. R. Anderson, Masato Murakami, G. J. Russell

Research output: Contribution to journalArticle

Abstract

Ultrasonic studies at 85 kHz on polycrystalline YBa2Cu 3O7-δ (Y123) below Tc, with an applied magnetic field, have yielded details of the interaction of the magnetic field with the superconductor. When the magnetic field is applied to the sample there is an immediate increase in acoustic damping, which then decreases logarithmically over an extended period of time to a trapped flux value. When the field is turned off a similar process is observed. The results are interpreted in terms of the Anderson-Kim model for thermally assisted flux creep, and they allow the determination of the apparent magnetic flux pinning energy. The results indicate two distinct pinning energies, one for the normal long term flux creep observed over minutes, and another lower value, which predominates during the first 5 s after a magnetic field is applied.

Original languageEnglish
Pages (from-to)575-579
Number of pages5
JournalSuperconductor Science and Technology
Volume17
Issue number4
DOIs
Publication statusPublished - 2004 Apr
Externally publishedYes

Fingerprint

Flux pinning
flux pinning
Magnetic flux
magnetic flux
ultrasonics
Ultrasonics
Magnetic fields
Fluxes
magnetic fields
Creep
energy
Superconducting materials
Damping
damping
Acoustics
acoustics
barium copper yttrium oxide
interactions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

An ultrasonic study of magnetic flux pinning and the determination of the flux pinning energy in YBa2Cu3O7-δ. / Anderson, A. R.; Murakami, Masato; Russell, G. J.

In: Superconductor Science and Technology, Vol. 17, No. 4, 04.2004, p. 575-579.

Research output: Contribution to journalArticle

@article{ea95f6e015dc45688841f132f480ee34,
title = "An ultrasonic study of magnetic flux pinning and the determination of the flux pinning energy in YBa2Cu3O7-δ",
abstract = "Ultrasonic studies at 85 kHz on polycrystalline YBa2Cu 3O7-δ (Y123) below Tc, with an applied magnetic field, have yielded details of the interaction of the magnetic field with the superconductor. When the magnetic field is applied to the sample there is an immediate increase in acoustic damping, which then decreases logarithmically over an extended period of time to a trapped flux value. When the field is turned off a similar process is observed. The results are interpreted in terms of the Anderson-Kim model for thermally assisted flux creep, and they allow the determination of the apparent magnetic flux pinning energy. The results indicate two distinct pinning energies, one for the normal long term flux creep observed over minutes, and another lower value, which predominates during the first 5 s after a magnetic field is applied.",
author = "Anderson, {A. R.} and Masato Murakami and Russell, {G. J.}",
year = "2004",
month = "4",
doi = "10.1088/0953-2048/17/4/001",
language = "English",
volume = "17",
pages = "575--579",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "4",

}

TY - JOUR

T1 - An ultrasonic study of magnetic flux pinning and the determination of the flux pinning energy in YBa2Cu3O7-δ

AU - Anderson, A. R.

AU - Murakami, Masato

AU - Russell, G. J.

PY - 2004/4

Y1 - 2004/4

N2 - Ultrasonic studies at 85 kHz on polycrystalline YBa2Cu 3O7-δ (Y123) below Tc, with an applied magnetic field, have yielded details of the interaction of the magnetic field with the superconductor. When the magnetic field is applied to the sample there is an immediate increase in acoustic damping, which then decreases logarithmically over an extended period of time to a trapped flux value. When the field is turned off a similar process is observed. The results are interpreted in terms of the Anderson-Kim model for thermally assisted flux creep, and they allow the determination of the apparent magnetic flux pinning energy. The results indicate two distinct pinning energies, one for the normal long term flux creep observed over minutes, and another lower value, which predominates during the first 5 s after a magnetic field is applied.

AB - Ultrasonic studies at 85 kHz on polycrystalline YBa2Cu 3O7-δ (Y123) below Tc, with an applied magnetic field, have yielded details of the interaction of the magnetic field with the superconductor. When the magnetic field is applied to the sample there is an immediate increase in acoustic damping, which then decreases logarithmically over an extended period of time to a trapped flux value. When the field is turned off a similar process is observed. The results are interpreted in terms of the Anderson-Kim model for thermally assisted flux creep, and they allow the determination of the apparent magnetic flux pinning energy. The results indicate two distinct pinning energies, one for the normal long term flux creep observed over minutes, and another lower value, which predominates during the first 5 s after a magnetic field is applied.

UR - http://www.scopus.com/inward/record.url?scp=2142752485&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2142752485&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/17/4/001

DO - 10.1088/0953-2048/17/4/001

M3 - Article

AN - SCOPUS:2142752485

VL - 17

SP - 575

EP - 579

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 4

ER -