منابع مشابه
Permanent magnet with MgB2 bulk superconductor
Superconductors with persistent zero-resistance currents serve as permanent magnets for high-field applications requiring a strong and stable magnetic field, such as magnetic resonance imaging (MRI). The recent global helium shortage has quickened research into high-temperature superconductors (HTSs)—materials that can be used without conventional liquid-helium cooling to 4.2 K. Herein, we demo...
متن کاملSuperconducting Microwave Cavity Made of Bulk MgB2
We report the successful manufacture and characterization of a microwave resonant cylindrical cavity made of bulk MgB2 superconductor (Tc ≈ 38.5 K), which has been produced by the Reactive Liquid Mg Infiltration technique. The quality factor of the cavity for the TE011 mode, resonating at 9.79 GHz, has been measured as a function of the temperature. At T = 4.2 K, the unloaded quality factor is ...
متن کاملFlux pinning force in bulk MgB2 with variable grain size
E. Martínez,1,* P. Mikheenko,2,† M. Martínez-López,1 A. Millán,1 A. Bevan,2 and J. S. Abell2 1Instituto de Ciencia de Materiales de Aragón, CSIC–Universidad de Zaragoza, C/María de Luna 3, 50018 Zaragoza, Spain 2Metallurgy and Materials, School of Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom Received 31 October 2006; revised manuscript received 21 Decembe...
متن کاملHarmonic susceptibilities and pinning properties of MgB2 bulk superconductors
The fundamental and third harmonics of the ac magnetic susceptibility have been studied on MgB2 bulk superconductors, obtained by reactive liquid infiltration. In particular, measurements performed as a function of temperature, dc magnetic field, ac field amplitude and frequency have been compared with susceptibility curves obtained by means of numerical simulations of the non-linear diffusion ...
متن کاملHydrogen in bulk and nanoscale ZnO
Zinc oxide (ZnO) is a wide-band gap semiconductor that has attracted resurgent interest as an electronic material for a range of applications. In our work, we have focused on the properties of hydrogen donors in ZnO. In bulk, single-crystal ZnO doped with hydrogen or deuterium, infrared (IR) absorption peaks corresponding to O–H and O–D stretch modes were observed at 3326.3 and 2470.3 cm , resp...
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ژورنال
عنوان ژورنال: Scripta Materialia
سال: 2016
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2016.02.020