Robust high-temperature magnetic pinning induced by proximity in YBa2Cu3O7-8/La0.67Sr0.33MnO3 hybrids

Authors

C.Z Chen, Shanghai University China
Z Y. Liu, Shanghai University China
Y M. Lu, Shanghai University China
L Zeng, Shanghai University China
C B. Cai, Shanghai University China
Rong Zeng, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

37729

Publication Details

Chen, C., Liu, Z. Y., Lu, Y. M., Zeng, L., Cai, C. B., Zeng, R. & Dou, S. Xue. (2011). Robust high-temperature magnetic pinning induced by proximity in YBa2Cu3O7-8/La0.67Sr0.33MnO3 hybrids. Journal of Applied Physics, 109 (7), 073921-1-073921-5.

Abstract

An elaborately designed bilayer consisting of superconducting YBa₂Cu₃O_7-6 (YBCO) and ferromagnetic La_0.67Sr_0.33MnO_3-6 (LSMO) was prepared on a single crystal LaAlO₃ substrate by pulsed laser deposition (PLD), with a view to understanding the mechanism behind the influence of superconductor/ferromagnet proximity on the critical current density, J_c. The present bilayer system shows significant modifications in J_c, as evidenced by the suppressed decay of its temperature dependence, as well as the crossing behavior of the magnetic field dependence of J_c at high temperatures. This indicates that enhanced flux pinning emerges at high temperatures, and it is believed to arise from the special magnetic inhomogeneity, i.e., the ferromagnet/antiferromagnet clusters caused by phase separation due to the epitaxial stress between LSMO and the substrate.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205