Physics – Condensed Matter – Superconductivity
Scientific paper
2006-08-24
Phys. Rev. B 74, 220507 (2006)
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.74.220507
We have measured the superconducting transition temperature T_c of F/S/F trilayers using Permalloy (Py=Ni_84 Fe_16) as a strongly polarized ferromagnetic material. For a parallel (P) or anti-parallel (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 et al., 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.
Jr.
Birge Norman O.
Moraru Ion C.
Pratt William P.
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