Observation of standard spin-switch effects in ferromagnet/superconductor/ferromagnet trilayers with a strong ferromagnet
Observation of standard spin-switch effects in ferromagnet/superconductor/ferromagnet trilayers with a strong ferromagnet
复制标题
DOI：
10.1103/physrevb.74.220507
复制
发表时间：
2006-12-01
影响因子：
3.7
通讯作者：
Birge, Norman O.
中科院分区：
文献类型：
--
作者：
Moraru, Ion C.;Pratt, W. P., Jr.;Birge, Norman O.
我们用坡莫合金（Py= Ni_（84）Fe_（16））作为强极化铁磁材料，测量了铁磁/超导体/铁磁三层膜的超导转变温度Tc。对于平行（P）或反平行（AP）排列的外铁磁体的磁化方向，我们观察到的T-c差异高达20 mK，在P状态比在AP状态具有更强的超导抑制。这种行为与Rusanov [Phys. Rev. B 73，060505（2006）]最近在Py/Nb/Py三层中的观察相反，但与Ni或CuNi合金作为铁磁材料的三层的早期结果一致。
We have measured the superconducting transition temperature T-c of ferromagnet/superconductor/ferromagnet trilayers using Permalloy (Py=Ni84Fe16) as a strongly polarized ferromagnetic material. For a parallel (P) or antiparallel (AP) alignment of the magnetization directions of the outer ferromagnets, we observe a T-c difference as large as 20 mK, with a stronger suppression of superconductivity in the P state than in the AP state. This behavior is opposite to the recent observations of Rusanov [Phys. Rev. B 73, 060505 (2006)] in Py/Nb/Py trilayers, but is consistent with earlier results on trilayers with Ni or CuNi alloy as the ferromagnetic material.