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RESEARCH PRODUCT
Anomalous magnetic hysteresis in the microwave surface resistance of MgB2 superconductor
M. Li VigniMarco BonuraA. Agliolo Gallittosubject
SuperconductivitySuperconductivityHistoryMicrowave surface resistanceMaterials scienceCondensed matter physicsFluxonMgB2Condensed Matter - SuperconductivitySettore FIS/01 - Fisica SperimentaleFOS: Physical sciencesMagnetic hysteresismicrowave surface impedanceComputer Science ApplicationsEducationElectromagnetic inductionMagnetic fieldSuperconductivity (cond-mat.supr-con)Lattice (order)Bulk samplesCondensed Matter::Superconductivitydescription
We report experimental results of the field-induced variations of the microwave surface resistance in samples of MgB2, produced by different methods. By sweeping the DC magnetic field at increasing and decreasing values, we have detected a magnetic hysteresis that can be ascribed to the different magnetic induction, due to the critical state of the fluxon lattice. The hysteresis observed in the bulk samples has an unusual shape, which cannot be justified in the framework of the critical-state models.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-09-06 |