6533b821fe1ef96bd127ade5
RESEARCH PRODUCT
Vortex motion in Nb/PdNi/Nb trilayers: new aspects in the flux flow state
Carmine AttanasioCarla CirilloKostiantyn TorokhtiiStefano SartiE. A. IlyinaNicola PompeoEnrico Silvasubject
SuperconductivityMaterials scienceField (physics)Condensed matter physicsCondensed Matter - SuperconductivityEnergy Engineering and Power TechnologyFOS: Physical sciencesDielectric resonatorVorticityCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectElectronic Optical and Magnetic MaterialsVortexSuperconductivity (cond-mat.supr-con)FerromagnetismElectrical resistivity and conductivityCondensed Matter::SuperconductivityElectrical and Electronic Engineeringsuperconductors; nb; mixed state; s/f hybrids; dielectric resonator; resistance; vortex dynamics; surface impedance; corbino disk; vortices; temperatureMicrowavedescription
We study the dynamics of vortex lines in Supercondutor/Ferromagnet/Superconductor (SFS) heterostructures at microwave frequencies. We have employed swept-frequency, Corbino-disk and resonant, dielectric-resonator techniques to obtain the field and temperature dependence of the vortex-state parameters. We concentrate here on the genuine flux-flow resistivity $\rho_{ff}$, that we access at subcritical currents using a sufficiently high driving frequency. We find that $\rho_{ff}$ does not follow the well-known Bardeen-Stephen model. Instead, it is well described by a full time-dependent Ginzburg-Landau expression at very thin F layer thickness, but changes to a previously unreported field-dependence when the F layer exceeds a few nm.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-12-21 |