Thickness and field dependent superconductivity in YBa2Cu3O7/La0.7Sr0.3MnO3 bilayers

被引：3
作者：
Lin, J. G. [1 ]
Hsu, Daniel [1 ]
Song, M. Y. [1 ,2 ]
Chiang, C. H. [3 ]
Chan, W. C. [3 ]
机构：
[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan
[2] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
[3] Tamkang Univ, Dept Phys, Taipei 251, Taiwan
来源：
JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 09期
关键词：
FERROMAGNET; JUNCTIONS; HETEROSTRUCTURES; TRANSPORT;
D O I：
10.1063/1.3366605
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Transport and magnetization properties of superconducting/ferromagnetic bilayers YBa2Cu3O7/La0.7Sr0.3MnO3 (YBCO/LSMO) are investigated with the thickness of bottom LSMO layer fixed at 50 nm and that of top YBCO (t) layer varied from 20 to 100 nm. Compared to bulk YBCO, the off set of superconducting temperature TSC-off is suppressed by 10 K for t=20 nm. The suppression rate of T-SC versus magnetic field H is obtained as 1.2 +/- 0.2 K/T for all bilayers. Considering the polarization effect of LSMO on superconductivity is similar to the field effect, the internal field created by the LSMO in the YBCO(20nm)/LSMO(50nm) bilayer is estimated as 40 T. (C) 2010 American Institute of Physics. [doi:10.1063/1.3366605]
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页数：3
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