We combine wideband (1–20 GHz) Corbino Disk and Dielectric Resonator (8.2 GHz) techniques to study the microwave properties in Nb/PdNi/Nb trilayers, grown by UHV dc magnetron sputtering, composed by Nb layers of nominal thickness dS = 15 nm, and a ferromagnetic PdNi layer of thicknesses dF = 1, 2, 8 and 9 nm. We focus on the vortex state. Magnetic fields up to Hc2 were applied. The microwave resistivity at fixed H/Hc2 increases with dF , eventually exceeding the Bardeen–Stephen flux-flow value. Vortex pinning is very weak at large dF.
Microwave properties of Nb/PdNi/Nb
ATTANASIO, Carmine;CIRILLO, CARLA;
2013-01-01
Abstract
We combine wideband (1–20 GHz) Corbino Disk and Dielectric Resonator (8.2 GHz) techniques to study the microwave properties in Nb/PdNi/Nb trilayers, grown by UHV dc magnetron sputtering, composed by Nb layers of nominal thickness dS = 15 nm, and a ferromagnetic PdNi layer of thicknesses dF = 1, 2, 8 and 9 nm. We focus on the vortex state. Magnetic fields up to Hc2 were applied. The microwave resistivity at fixed H/Hc2 increases with dF , eventually exceeding the Bardeen–Stephen flux-flow value. Vortex pinning is very weak at large dF.File in questo prodotto:
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