TY - JOUR
T1 - Temperature dependence of the critical current of YBCO-STO-LCMO heterostructures near Tc
AU - Khokhlov, VA
AU - Prokhorov, AY
AU - Drobotko, VF
AU - Levchenko, GG
AU - Mikheenko, Pavlo
AU - Chakalov, Radoslav
AU - Muirhead, Christopher
PY - 2003/1/1
Y1 - 2003/1/1
N2 - The complex differential susceptibility of a YBCO film and YBCO-STO-LCMO structures with different thicknesses of the STO layer (0, 2, and 7 nm) is investigated. It is shown that for a YBCO-LCMO structure the temperature of the superconducting transition T-onset and the critical current density j(c) are observed to decrease in comparison with a pure YBCO film. In a YBCO-STO-LCMO structure, on the contrary, T-onset increases, while j(c) increases for the structure with the 2 nm thickness of STO and decreases for that with 7 nm of STO. It is conjectured that there is a change of the vortex pinning mechanism as the temperature is lowered. (C) 2003 American Institute of Physics.
AB - The complex differential susceptibility of a YBCO film and YBCO-STO-LCMO structures with different thicknesses of the STO layer (0, 2, and 7 nm) is investigated. It is shown that for a YBCO-LCMO structure the temperature of the superconducting transition T-onset and the critical current density j(c) are observed to decrease in comparison with a pure YBCO film. In a YBCO-STO-LCMO structure, on the contrary, T-onset increases, while j(c) increases for the structure with the 2 nm thickness of STO and decreases for that with 7 nm of STO. It is conjectured that there is a change of the vortex pinning mechanism as the temperature is lowered. (C) 2003 American Institute of Physics.
UR - http://www.scopus.com/inward/record.url?scp=22544432856&partnerID=8YFLogxK
U2 - 10.1063/1.1542409
DO - 10.1063/1.1542409
M3 - Article
SN - 1090-6517
VL - 29
SP - 113
EP - 116
JO - Low Temperature Physics
JF - Low Temperature Physics
IS - 2
ER -