Superconductivity in thin-film YBa2Cu3O7-δ/La0.7Ca0.3MnO3 bilayers

被引：19

作者：

Allsworth, MD ^{[1
]}

Chakalov, RA ^{[1
]}

Colclough, MS ^{[1
]}

Mikheenko, P ^{[1
]}

Muirhead, CM ^{[1
]}

机构：

[1] Univ Birmingham, Birmingham B15 2TT, W Midlands, England

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 22期

关键词：

D O I：

10.1063/1.1480888

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the influence of the magnetic state of thin films of La0.7Ca0.3MnO3 (LCMO) on the superconducting order parameter in LCMO/YBa2Cu3O7-delta (YBCO) thin-film bilayers. We find that the number density of Cooper pairs is enhanced at the coercive field of the LCMO layer relative to that where the magnetic moment is saturated. This effect is at most similar to10% and is only observable within a few degrees of the superconducting transition temperature. Experiments with thin SrTiO3 layers between the LCMO and YBCO layers provide strong evidence that the effect is a consequence of the spin-polarized nature of the electrons at the interface, rather than a direct magnetic effect. (C) 2002 American Institute of Physics.

引用

页码：4196 / 4198

页数：3

共 14 条

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