Asymmetric ferromagnet-superconductor-ferromagnet switch

Title
Asymmetric ferromagnet-superconductor-ferromagnet switch
Authors
Cadden-Zimansky, P.; Bazaliy, Y.B.; Litvak, L.M.; Jiang, J.S.; Pearson, J.; Gu, J.Y.; You, C.Y.; Beasley, M.R.; Bader, S.D.
Keywords
ferromagnet-superconductor-ferromagnet, MAGNETIZATION
Issue Date
2008-05
Publisher
AMER PHYSICAL SOC
Abstract
In layered ferromagnet-superconductor-ferromagnet (F-1/S/F-2) structures, the critical temperature T-c of the superconductors depends on the magnetic orientation of the ferromagnetic layers F-1 and F-2 relative to each other. So far, the experimentally observed magnitude of change in T-c for structures utilizing weak ferromagnets has been 2 orders of magnitude smaller than is expected from calculations. We theoretically show that such a discrepancy can result from the asymmetry of F/S boundaries, and we test this possibility by performing experiments on structures where F-1 and F-2 are independently varied. Our experimental results indicate that asymmetric boundaries are not the source of the discrepancy. If boundary asymmetry is causing the suppressed magnitude of T-c changes, it may only be possible to detect in structures with thinner ferromagnetic layers.
URI
http://dspace.inha.ac.kr/handle/10505/1958
ISSN
1098-0121
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Journal Papers, Peports(물리학 학술논문, 보고서)
Files in This Item:
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