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Angular Dependence of the Superconducting Transition Temperature in Ferromagnet-Superconductor-Ferromagnet Trilayers

机译:超导转变温度的角度依赖性   Ferromagnet-superconductor-Ferromagnet Trilayers

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摘要

The superconducting transition temperature, $T_c$, of a ferromagnet (F) -superconductor (S) - ferromagnet trilayer depends on the mutual orientation ofthe magnetic moments of the F layers. This effect has been previously observedin F/S/F systems as a $T_c$ difference between parallel and antiparallelconfigurations of the F layers. Here we report measurements of $T_c$ inCuNi/Nb/CuNi trilayers as a function of the angle between the magnetic momentsof the CuNi ferromagnets. The observed angular dependence of $T_c$ is inqualitative agreement with a F/S proximity theory that accounts for the oddtriplet component of the condensate predicted to arise for non-collinearorientation of the magnetic moments of the F layers.
机译:铁磁体(F)-超导体(S)-铁磁体三层的超导转变温度$ T_c $取决于F层磁矩的相互取向。先前已经在F / S / F系统中观察到此效果,因为F层的并行配置和反并行配置之间存在$ T_c $差异。在这里,我们报告在CuNi / Nb / CuNi三层中$ T_c $的测量值与CuNi铁磁体的磁矩之间的夹角的关系。观测到的$ T_c $的角度依赖性与F / S邻近理论在定性上达成一致,该理论解释了F层磁矩的非共线取向所预测的凝结水的奇三重分量。

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