Observation of standard spin-switch effects in ferromagnet/superconductor/ferromagnet trilayers with a strong ferromagnet
Ion C. Moraru, W. P. Pratt, Jr., Norman O. Birge
DOI 10.1103/PhysRevB.74.220507 · Physical Review B
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Abstract
We have measured the superconducting transition temperature Tc 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 Tc difference as large as 20mK, 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.42 | Pressure not reported | midpoint |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.385 | Pressure not reported | midpoint |
| YBa2Cu3O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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