6533b830fe1ef96bd1297cd1

RESEARCH PRODUCT

Time evolution of the microwave second-harmonic response of MgB2 superconductor

A. Agliolo GallittoGabriella VaglicaM. Li Vigni

subject

SuperconductivityPhysicsCondensed matter physicsFluxonCondensed Matter - SuperconductivityTime evolutionFOS: Physical sciencesEnergy Engineering and Power TechnologySecond-harmonic generationCondensed Matter PhysicsSignalElectronic Optical and Magnetic MaterialsMagnetic fieldSuperconductivity (cond-mat.supr-con)Condensed Matter::SuperconductivityTransient (oscillation)Electrical and Electronic EngineeringMicrowave

description

We report on transient effects in the microwave second-order response of two ceramic MgB2 samples. The time evolution of the second-harmonic signal is investigated for about 500 s after the sample has been exposed to a variation of the dc magnetic field. We suggest that during the first seconds the response is determined by diffusive motion of fluxons, while in the time scale of minutes it is ruled by magnetic relaxation over the surface barrier.

yearjournalcountryeditionlanguage
2003-10-14Physica C: Superconductivity
https://doi.org/10.1016/j.physc.2003.10.039