Sweep-rate dependent reversal of magnetic moment in superconducting films

Pavlo Mikheenko; Mark Colclough; Radoslav Chakalov; K Kawano; Christopher Muirhead

doi:10.1142/S0217984903005664

Sweep-rate dependent reversal of magnetic moment in superconducting films

Pavlo Mikheenko
, Mark Colclough
, Radoslav Chakalov
, K Kawano
, Christopher Muirhead

Research output: Contribution to journal › Article

Abstract

We report on a dynamical effect in YBa2Cu3Ox (YBCO) films and YBCO/CMR (Colossal Magnetoresistive) multilayers, in which variations in the magnetic field sweep rate can change, or reverse the sign of, the magnetic moment. The effect occurs in thin films having a low critical current density, either intrinsically or as a result of operation near the critical temperature. We attribute this effect to the large demagnetizing field present in the films, leading to a relaxation in the non-equilibrium vortex distribution, in which current near the edge of the film changes direction. We have investigated this effect in a variety of systems by magnetometery, and provide some magneto-optical evidence of its mechanism.

Original language	English
Pages (from-to)	635-647
Number of pages	13
Journal	Modern Physics Letters B
Volume	17
DOIs	https://doi.org/10.1142/S0217984903005664
Publication status	Published - 1 Jan 2003

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title = "Sweep-rate dependent reversal of magnetic moment in superconducting films",

abstract = "We report on a dynamical effect in YBa2Cu3Ox (YBCO) films and YBCO/CMR (Colossal Magnetoresistive) multilayers, in which variations in the magnetic field sweep rate can change, or reverse the sign of, the magnetic moment. The effect occurs in thin films having a low critical current density, either intrinsically or as a result of operation near the critical temperature. We attribute this effect to the large demagnetizing field present in the films, leading to a relaxation in the non-equilibrium vortex distribution, in which current near the edge of the film changes direction. We have investigated this effect in a variety of systems by magnetometery, and provide some magneto-optical evidence of its mechanism.",

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AU - Mikheenko, Pavlo

AU - Colclough, Mark

AU - Chakalov, Radoslav

AU - Kawano, K

AU - Muirhead, Christopher

PY - 2003/1/1

Y1 - 2003/1/1

N2 - We report on a dynamical effect in YBa2Cu3Ox (YBCO) films and YBCO/CMR (Colossal Magnetoresistive) multilayers, in which variations in the magnetic field sweep rate can change, or reverse the sign of, the magnetic moment. The effect occurs in thin films having a low critical current density, either intrinsically or as a result of operation near the critical temperature. We attribute this effect to the large demagnetizing field present in the films, leading to a relaxation in the non-equilibrium vortex distribution, in which current near the edge of the film changes direction. We have investigated this effect in a variety of systems by magnetometery, and provide some magneto-optical evidence of its mechanism.

AB - We report on a dynamical effect in YBa2Cu3Ox (YBCO) films and YBCO/CMR (Colossal Magnetoresistive) multilayers, in which variations in the magnetic field sweep rate can change, or reverse the sign of, the magnetic moment. The effect occurs in thin films having a low critical current density, either intrinsically or as a result of operation near the critical temperature. We attribute this effect to the large demagnetizing field present in the films, leading to a relaxation in the non-equilibrium vortex distribution, in which current near the edge of the film changes direction. We have investigated this effect in a variety of systems by magnetometery, and provide some magneto-optical evidence of its mechanism.

UR - https://www.scopus.com/pages/publications/0042672803

U2 - 10.1142/S0217984903005664

DO - 10.1142/S0217984903005664

M3 - Article

VL - 17

SP - 635

EP - 647

JO - Modern Physics Letters B

JF - Modern Physics Letters B

ER -

Sweep-rate dependent reversal of magnetic moment in superconducting films

Abstract

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