TY - JOUR
T1 - Sweep-rate dependent reversal of magnetic moment in superconducting films
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 - http://www.scopus.com/inward/record.url?scp=0042672803&partnerID=8YFLogxK
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 -