TY - JOUR
T1 - Origin of experimental order-disorder transition line curvature in the La2-x Srx CuO4 single crystal vortex system at low temperatures
AU - Miu, L.
AU - Adachi, T.
AU - Koike, Y.
AU - Miu, D.
AU - Diaz, S.
AU - Chouteau, G.
PY - 2005/8/1
Y1 - 2005/8/1
N2 - We investigated the dc magnetization curves of overdoped La2-x Srx CuO4 single crystals in the low-temperature T range, with the external magnetic field H oriented along the c axis. It was found that the onset field for the second magnetization peak, associated with the order-disorder transition in the vortex system, increases significantly with decreasing T in the low- T region, where the superconductor parameters are independent of T. The upward curvature of the order-disorder transition line determined in standard magnetization measurements at low T is explained by considering the reduction of the actual pinning energy due to the macroscopic currents induced in the sample. A simple energy balance equation for the dynamic conditions generated in the widely performed magnetization studies is proposed.
AB - We investigated the dc magnetization curves of overdoped La2-x Srx CuO4 single crystals in the low-temperature T range, with the external magnetic field H oriented along the c axis. It was found that the onset field for the second magnetization peak, associated with the order-disorder transition in the vortex system, increases significantly with decreasing T in the low- T region, where the superconductor parameters are independent of T. The upward curvature of the order-disorder transition line determined in standard magnetization measurements at low T is explained by considering the reduction of the actual pinning energy due to the macroscopic currents induced in the sample. A simple energy balance equation for the dynamic conditions generated in the widely performed magnetization studies is proposed.
UR - http://www.scopus.com/inward/record.url?scp=33644943979&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33644943979&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.72.052513
DO - 10.1103/PhysRevB.72.052513
M3 - Article
AN - SCOPUS:33644943979
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 5
M1 - 052513
ER -