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Showing 1 to 17 of 17 for “"MgB2"”.
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AC loss in MgB2-based fully superconducting electric machines
Superconducting electric machines have shown potential for dramatic increases in specific power for applications such as offshore wind generation, turbo-electric distributed propulsion in aircraft, and ship propulsion. Superconductors exhibit zero loss in dc conditions, though ac current produces …
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Experimental and 2D/3D modelling investigation of DC magnetic shielding by machinable MgB2 bulks
L'abstract è presente nell'allegato / the abstract is in the attachment
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Magnesium Diboride Superconducting Devices and Circuits
While magnesium diboride (MgB2) was first synthesized in the 1950s, MgB2’s superconductive properties were not discovered until 2001. It has the highest superconducting transition temperature of all the metallic superconductors at ~39 K at atmospheric pressure. MgB2 is also unique in that it has a …
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Modification of Iron pnictide and MgB2 thin films using focused He+ ion beam irradiation for superconducting devices
… behind this work. The materials of interest are MgB2 and Co-doped Ba122. Superconducting properties of MgB2 were discovered in 2001. It is the first superconductor recognized as a multigap superconductor. Owing to its high Tc of ~39K, electronic circuits based on this material are expected to …
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Chemical Vapor Deposition of Metal Diboride and Metal Oxide Thin Films From Borohydride-Bonded Precursors
The high Tc superconductor MgB2 were deposited at low temperatures (T = 300°C--400°C) from a recently developed highly volatile borohydride-bonded Mg precursor, by means of catalyst-enhanced chemical vapor deposition. The films are stoichiometric and highly crystallized, however, the …
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Applications of High-Intensity Ultrasound for Synthesis and Modification of Advanced Materials
… materials. Study conducted on obtained Fe2O3-MgB2 and Mo2O5-MgB2 nanocomposite material exhibit significant enhancement of magnetic flux pinning. Similar study focused on such promising high-Tc superconductors as YBa 2Ca3CuO7-delta and Bi2Sr 2CaCu2O8+x. (Abstract shortened by UMI.)."
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Scanning tunneling microscopy and spectroscopy of tip-induced direct writing of nanometallization in ultra-high vacuum
… (STM) nanometallization on Si(100):H of HfB2 and MgB2. We first give an introduction to graphene nanoribbons (GNRs) along with STM and the techniques therein. We found that with STM, self-standing nanoscale features including dots, wires, and 3D structures can be made. The steps required in STM …
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Synthetic studies of sodium aminodiboranate salts with electronwithdrawing substituents
Magnesium diboride, MgB2, has the highest superconducting critical temperature of all traditional superconductors and is being considered for the fabrication of superconducting integrated circuits that can operate at higher temperatures than analogous niobium alloy circuits. A significant barrier …
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Part I. Synthesis of Metal Hydroborates as Potential Chemical Vapor Deposition Precursors. Part II. Chemical Vapor Deposition of Titanium-Doped Magnesium Diboride Thin Films
… CVD processes to grow superconducting MgB2 thin films at temperatures below 400°C.
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Josephson Currents In Two-Gap Superconductor-Insulator- Superconductor Junctions
… junction with two-gap superconductors such as MgB2 and iron superconductors, we study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their …
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Destabilization of lithium borohydride with additions of magnesium hydride
… to increase with increasing amounts of LiBH4. No MgB2 or LiH was detected in the desorption products of samples dehydrogenated up to 450°C under 3 bar of flowing Ar but evidence for a Li – Mg phase was detected.
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Thermodynamik von Mehrband-Supraleitern
… des supraleitenden Zustands von MgCNi3, MgB2 und einigen Seltenerd-Nickel-Borkarbiden anhand von Messungen der spezifischen Wärme untersucht. Der die Supraleitung verursachende Cooper-Paarzustand der Elektronen wird durch eine Wechselwirkung der Elektronen mit Gitterschwingungen erzeugt. …
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Crystal growth and perfection of selected intermetallic and oxide compounds
… thermoelectric properties, respectively; MgB2 and LiBC to test of theoretical predictions of the new superconducting intermetallic compounds discovered in the last years; SrTiO3 and SrZrO3 oxide compounds with special dielectric and optical properties. For this wide spectrum of substances …
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Novel micron- and nano-scale energetic materials for advanced gun propulsion, their material properties, and their effects on ballistic performance
… of 950 C when using Magnesium Boride (MgB2) in the thermally induced CVD process. The small scale synthesis of boron nanotubes /nanofibers carried out using MgB_2 powder, Nickel Boride (Ni2B) powder catalysts and mesostructured hexagonal framework zeolite powder was successfully …
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Advanced Numerical Modelling of Bulk Superconductor Magnetisation
Superconductivity is the observation of the vanishing electrical resistance of a material, and the expulsion of magnetic fields from within its volume, below a certain (critical) temperature. Superconductors can be subdivided into two classifications; type-I, or type-II, with the latter exhibiting …