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RESEARCH PRODUCT

Microwave response of a cylindrical cavity made of bulk MgB2 superconductor

G. BonsignoreYu. A. NefyodovGiovanni GiunchiA. Agliolo GallittoM. Li Vigni

subject

SuperconductivityFrequency responseMaterials scienceCondensed matter physicsMgB2Condensed Matter - SuperconductivitySettore FIS/01 - Fisica SperimentaleFOS: Physical sciencesEnergy Engineering and Power TechnologyAtmospheric temperature rangeCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsSuperconducting microwave cavitySuperconductivity (cond-mat.supr-con)Surface conductivityQuality (physics)Surface resistanceElectrical and Electronic EngineeringSheet resistanceMicrowaveMicrowave cavity

description

We report on the microwave properties of a resonant cylindrical cavity made of bulk MgB2 superconductor, produced by the reactive liquid Mg infiltration process. The frequency response of the cavity has been measured in the range 5-13GHz. Among the various modes, the TE011, resonating at 9.79GHz, exhibits the highest quality factor. For this mode, we have determined the temperature dependence of the quality factor, obtaining values of the order of 10^5 in the temperature range 4.2-30K. The values of the surface resistance deduced from the measurements of the quality factor agree quite well with those independently measured in a small sample of MgB2 extracted from the same specimen from which the cavity has been obtained.

yearjournalcountryeditionlanguage
2008-01-01
10.1016/j.physc.2007.10.016http://arxiv.org/abs/0709.1691