نتایج جستجو برای: niobium surface preparation
تعداد نتایج: 799254 فیلتر نتایج به سال:
Weyl semimetals are expected to open up new horizons in physics and materials science because they provide the first realization of Weyl fermions and exhibit protected Fermi arc surface states. However, they had been found to be extremely rare in nature. Recently, a family of compounds, consisting of tantalum arsenide, tantalum phosphide (TaP), niobium arsenide, and niobium phosphide, was predi...
The surface resistance of niobium nitride {NbN) thin films has been measured at 7. 78 and 10.14 GHz in the temperature range of 1.5 to 4.2 K. The films were reactively sputtered on sapphire substrates to a thickness of approximately 1 micron. The surface resistance was determined by measuring the quality factor (Q) of the TEo] 1 mode of a lead-plated copper cavity where the NbN served as one en...
We report electrical measurements of ' a sandwich structure consisting of a niobium electrode in contact with a thin lightly doped n type InGaAs layer. The bottom of the sandwich is a degenerate layer of n-type InGaAs used to collect the current. The semiconductor layers are grown by molecular beam epitaxy (MBB). These three layers are the essence of the proposed superconducting-base, semicondu...
The protection of metallic surface is commonly done with zinc phosphate in acid aqueous phosphate solutions containing zinc ions and phosphoric acid, as well in addition of other metallic ions (nickel, chromium, calcium, niobium etc.), in presence of accelerators as nitrate ions, hydroxylamine sulfate, benzotriazole and others. The present article is a study on the surface structure of zinc pho...
A new method based on a light-gas gun has been proposed to synthesize Nb-Al alloys, and recovery capsule investigated. The copper-coated sample is accessible after shock wave loading. In this paper, we successfully which are high-temperature structural materials. X-ray diffraction employed clarify the characteristics of compounds impact, simulation diffractions structure. detail, tetragonal NbA...
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