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

A. R. Anderson; M. Murakami; G. J. Russell

doi:10.1088/0953-2048/17/4/001

An ultrasonic study of magnetic flux pinning and the determination of the flux pinning energy in YBa₂Cu₃O_7-δ

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

Research output: Contribution to journal › Article › peer-review

Abstract

Ultrasonic studies at 85 kHz on polycrystalline YBa₂Cu ₃O_7-δ (Y123) below T_c, 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 language	English
Pages (from-to)	575-579
Number of pages	5
Journal	Superconductor Science and Technology
Volume	17
Issue number	4
DOIs	https://doi.org/10.1088/0953-2048/17/4/001
Publication status	Published - 2004 Apr 1
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1088/0953-2048/17/4/001

Cite this

@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 M. Murakami and Russell, {G. J.}",

year = "2004",

month = apr,

day = "1",

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, M.

AU - Russell, G. J.

PY - 2004/4/1

Y1 - 2004/4/1

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

SN - 0953-2048

VL - 17

SP - 575

EP - 579

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 4

ER -

An ultrasonic study of magnetic flux pinning and the determination of the flux pinning energy in YBa₂Cu₃O_7-δ

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this