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Manifestation of New Interference Effects in Superconductor/Ferromagnet Spin Valve | P. V. Leksin
; N. N. Garifyanov
; I. A. Garifullin
; J. Schumann
; V. Kataev
; O. G. Schmidt
; B. Buchner
; | Date: |
25 Jan 2011 | Abstract: | Superconductor/ferromagnet (S/F) spin valve effect theories based on the S/F
proximity phenomenon assume that the superconducting transition temperature Tc
of F1/F2/S or F1/S/F2 trilayers for parallel magnetizations of the F1- and
F2-layers (TcP) are smaller than for the antiparallel orientations (TcAP).
Here, we report for CoOx/Fe1/Cu/Fe2/In multilayered systems with varying
Fe2-layer thickness the sign-changing oscillating behavior of the spin valve
effect Delta Tc=TcAP-TcP. Our measurements revealed the full direct spin valve
effect with TcAP>TcP for Fe2-layer thickness dFe2<1 nm and the full inverse
(TcAP<TcAP) spin valve effect for dFe2>=1 nm. Interference of Cooper pair wave
functions reflected from both surfaces of the Fe2-layer appear as the most
probable reason for the observed behavior of Delta Tc. | Source: | arXiv, 1101.4817 | Services: | Forum | Review | PDF | Favorites |
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