Superconductor/ferromagnet proximity effect in Fe/Pb/Fe trilayers
Superconductor/ferromagnet proximity effect in Fe/Pb/Fe trilayers
复制标题
DOI：
10.1103/physrevb.61.3711
复制
发表时间：
2000-02-01
影响因子：
3.7
通讯作者：
Garifullin, IA
中科院分区：
文献类型：
--
作者：
Lazar, L;Westerholt, K;Garifullin, IA
我们报告的结构，超导和磁性的三层和双层系统相结合的超导铅和铁磁铁的测量。的Pb/Fe层可以生长在Al 2 O3与合理平坦的界面，有没有合金的组件在界面处和Fe被发现是铁磁性的单层范围。这对于SIF邻近系统是有利的情况，因为它与理论模型中处理的情况紧密对应。我们发现一个振荡的超导转变温度时绘制的铁磁层的厚度，我们认为作为一个非常规的，传播超导对波函数的Pb/Fe系统的一个明确的指示。我们适合我们的结果，使用最近的理论模型计算，并找到证据的Pb/Fe界面的透明度大大降低。我们认为这是Pb/Fe邻近效应的一个重要特征，并讨论了它的物理起源。
We report on measurements of structural, superconducting, and magnetic properties of trilayer and bilayer systems combined of superconducting Pb and ferromagnetic Fe. The Pb/Fe layers can be grown on Al2O3 with reasonably flat interfaces, there is no alloying of the components at the interface and Fe is found to be ferromagnetic down to the monolayer range. This is a favorable situation for an SIF proximity system, since it corresponds closely to the situation treated in theoretical models. We find an oscillation of the superconducting transition temperature when plotted versus the thickness of the ferromagnetic layer, which we regard as a clear indication of an unconventional, propagating superconducting pair wave function in the Pb/Fe system. We fit our results using recent theoretical model calculations and find evidence for a strongly reduced transparency of the Pb/Fe interface. We regard this as an essential feature of the proximity effect in Pb/Fe and discuss its physical origin.