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Nb /Ni Bilayers: Superconductivity

Nb /Ni Bilayers: Superconductivity.

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Nb /Ni Bilayers: Superconductivity

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  1. Nb/Ni Bilayers: Superconductivity The purpose of this research is to study the upper critical field of S/F (superconductor/ferromagnet) bilayers and see how it varies in comparison to how the transition temperature varies. Films were grown by magnetron sputtering, with film thicknesses measured at the IEN at Georgia Tech. Films were measured both resistively and inductively as a function of both temperature and magnetic field. Niobium thickness was held at 33 nm, and Nickel thickness was varied from 0 to 8 nm. Daniel C. Ralph, Cornell University, ECCS 0335765 At right we show the film with leads and coil in place to measure film properties at low temperature. Critical temperature follows the nonmonotonic behavior of Usadel theory. Tim Ahrenholz, Emily Davis and Phillip Broussard, Covenant College Work performed at Georgia Tech Institute for Electronics and Nanotechnology

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