2 edition of Superconductivity in metal-semiconductor eutectic alloys found in the catalog.
Superconductivity in metal-semiconductor eutectic alloys
William L Johnson
Written in English
|Statement||by William L. Johnson|
|The Physical Object|
|Pagination||89 leaves :|
|Number of Pages||89|
Superconducting properties have not generally been associated with the platinum group metals. However, in T. Skoskiewicz of the Polish Academy of Sciences reported that palladium enriched with hydrogen possesses superconductivity, with a transition temperature T c of ∼5 K when H:Pd= Recent research in this field has been briefly summarised by R. Taylor (New . alloy (ăl`oi, əloi`) [O. Fr.,=combine], substance with metallic properties that consists of a metal fused with one or more metals or nonmetals. Alloys may be a homogeneous solid solution, a heterogeneous mixture of tiny crystals, a true chemical compound, or a mixture of these. Caltech Department of Applied Physics and Materials Science is home to academic and research programs in Applied Physics and in Materials Science. Research in Applied Physics is built on the foundations of quantum mechanics, statistical physics, electromagnetic theory, mechanics, and advanced mathematics. Materials Science research uses these same tools of physics and . K. Fisher, Q. Huang, and S. S. Papa Rao, “Processes for Uniform Metal Semiconductor Alloy Formation for Front Side Contact Metallization and Photovoltaic Device Formed Therefrom”, US Patent 9,, ().
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Drawn from the author's introductory course at the University of Orsay, Superconductivity of Metals and Alloys is intended to explain the basic knowledge of superconductivity for both experimentalists and theoreticians.
These notes begin with an elementary discussion of magnetic properties of Type I and Type II by: Drawn from the author's introductory course at the University of Orsay, Superconductivity of Metals and Alloys is intended to explain the basic knowledge of superconductivity for both experimentalists and theoreticians.
These notes begin with an elementary discussion of magnetic properties of Type I and Type II by: This book provides an overview of superconductivity and the various superconducting materials at the elementary level.
It is intended for physics, materials science and engineering students at the advanced undergraduate level or beginning graduate : R.
Abd-Shukor. The superconductivity of several metal-semiconductor simple eutectic alloys containing Ge or Si, and one of the metals Al, Be, In, Pb, Sn, or Tl was investigated.
The liquid-quenching technique was used to reduce the characteristic scale of the microstructure in the alloys. Superconductivity in Metals and Alloys The object of this report is to explain 1) the structure sensitive factors affecting the kinetics of the transition between the normal and superconducting states of selected metals, metal alloys, and intermetallic compounds, and 2)to explore the area of intermetallic compounds and compound alloys for new superconductors.
In an eutectic alloy obtained by melting the constituents, alternating domains of metal and semiconductor can exist in a well-defined microscopic array. The possibility of superconductivity arising from an interface interaction between the metal and semiconductor has been : C.
Tsuei and W. Johnson. The superconductivity of several metal-semiconductor simple eutectic alloys containing Ge or Si, and one of the metals Al, Be, In, Pb, Sn, or T1 has been investigated.
The liquid-quenching technique was used to reduce the characteristic scale of the microstructure in the : William Lewis Johnson. Not Available adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86ACited by: In the present study, the electrical resistance of a cast rod of the Au- Sn eutectic alloy was measured and it was found to be a superconductor below 1 K, with a relatively high critical field.
From the binary phase diagram4, Au-Sn at the eutectic concentration ( at% Au) phase separates into Superconductivity in metal-semiconductor eutectic alloys book and AuSn (62 and 38 at%, respectively), possibly with a lamellar Cited by: 2. The effect due to the tunneling of conduction electrons Superconductivity in metal-semiconductor eutectic alloys book the negative-U centers at the disordered metal-semiconductor interfaces on the superconductivity of metal-semiconductor eutectic alloys is considered.
Texas Received 2 May The superconducting transition temperature Tc has been measured in several bismuth eutectic alloys after exposure to 30 kbar pressure. It is found that the changes observed in Tc can be related to changes in Cited by: 1.
APPLICATIONS ki 1,2 and s 1,3 1) IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 Ag-B and Au-B systems are simple eutectic alloys . An essential role in the boride structures, unlike the carbides of the same metals,File Size: 2MB. Measurements are presented which show that the superconducting transition temperature of a eutectic alloy of Cd–Bi is °K in zero magnetic field.
Critical‐field measurements are given from which (dH c /dT) T=Tc is found to be 91 Oe/° results are discussed in terms of the phase diagram of the Cd–Bi system and in terms of the use of Cd–Bi eutectic Author: R. Fassnacht, J. Dillinger. Measurements are presented which show that the superconducting transition temperature of a eutectic alloy of Cd–Bi is °K in zero magnetic field.
Critical‐field measurements are given from which (dH c /dT) T=Tc is found to be 91 Oe/°: R. Fassnacht, J. Dillinger. The effect due to the tunneling of conduction electrons into the negative-U centers at the disordered metal-semiconductor interfaces on the superconductivity of metal-semiconductor eutectic alloys.
Conventional superconductors are insensitive to dilute non-magnetic impurities, known as Anderson’s theorem. Destruction of superconductivity and even superconductor–insulator transitions occur in the regime of strong disorder.
Hence, disorder-enhanced superconductivity is rare and has been observed only in some alloys or granular Cited by: 2.
of an understanding of superconductivity. We know that electric charge transport in metals takes place through the electrons. The concept that, in a metal, a definite number of electrons per atom (for instance, in the alkalis, one electron, the valence electron) exist freely, rather like a gas, was developed at an early time (by Paul Drude in.
The ternary alloys generally show better superconducting properties than the binary alloys, with the highest values of K, T and × 10 8 A m −2 measured for T C, B C2 (at K) and J C (at K, T) respectively in the Sn 35 In 50 Bi 15 alloy that consists of a matrix of β-phase with fine fibres of γ and BiIn by: 6.
Destruction of superconductivity and even superconductor- insulator transitions occur in the regime of strong disorder. Hence disorder-enhanced superconductivity is rare and has only been observed in some alloys or granular states Because of the entanglement of various effects, the mechanism of enhancement is still under by: 2.
A Sourcebook of Titanium Alloy Superconductivity. Authors (view affiliations) E. Collings; Book. 29 Citations; For the field of titanium alloy marketplace, and the economic forces that drive tech superconductivity, such an individual is Ted Collings.
nology soon focused on niobium-titanium alloys. Resistive transition in disordered superconductors with varying intergrain coupling Suppression of superconductivity in the vicinity of the metal–insulator transition has been observed in homogeneous superconductors such Tsuei C C and Johnson W L Superconductivity in metal-semiconductor eutectic alloys Phys.
Rev. B 9 Cited by: 9. polycrystals of superconducting alloys and that of pure superconductors. It appeared that in rod specimens of the alloys Bi + at%Tl, Sn + 58wt%Bi, Sn +wt%Cd (the latter two being close to the eutectic alloy) (De Haas & Voogd, ), in the alloy Pb + at%Tl, the.
Drawn from the author's introductory course at the University of Orsay, Superconductivity of Metals and Alloys is intended to explain the basic knowledge of superconductivity for both experimentalists and theoreticians. These notes begin with an elementary discussion of magnetic properties of Type I and Type II superconductors.
In about the same year, intensive researches of the deformable alloys Nb–Ti with continuous solubility in the liquid and solid states began as subjects of superconductivity. It turned out that at a content 40–50 at.
%Ti alloy with a critical temperature ~ K had the second critical magnetic field of 15 T at : V.P. Korzhov. Bonding Theory for Metals and Alloys exhorts the potential existence of covalent bonding in metals and alloys.
Through the recognition of the covalent bond in coexistence with the 'free' electron band, the book describes and demonstrates how the many experimental observations on metals and alloys can all be reconciled. Subsequently, it shows how the individual view of metals and alloys. Superconductivity in an alloy with quasicrystal structure by Nagoya University An electron diffraction pattern of Al-Zn-Mg quasicrystal with a.
Superconductivity is the flow of electric current without resistance in certain metals, alloys, and ceramics at temperatures near absolute zero, and in some cases at temperatures a considerable amount above absolute zero.
Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. Any material exhibiting these properties is a superconductor. The crystalline alloy Al-Zn-Mg became quasicrystalline when the Al content was reduced to 15 percent, while remaining a superconductor, with.
The study of heterogeneous superconductors has been a subject of great interest for the last several years because of the wide range of electrical properties of this class of material and thus the opportunities provided by this class of material for the research on problems of both academic and practical significance.
We have investigated two systems of this kind under high : Tzer-Hso Lin. Low temperature soldering technology encompasses Sn–Bi based alloys as reference materials for joints since such alloys may be molten at temperatures less than °C.
Despite the relatively high strength of these alloys, segregation problems. The Paperback of the A Sourcebook of Titanium Alloy Superconductivity by E.W.
Collings at Barnes & Noble. FREE Shipping on $35 or more. Due to COVID, orders may be delayed. Metal-semiconductor contacts are an obvious component of any semiconductor device. At the same time, such contacts cannot be assumed to have a resistance as low as that of two connected metals.
In particular, a large mismatch between the Fermi energy of the metal and semiconductor can result is a high-resistance rectifying contact. The recent discovery of superconductivity at 39 K in magnesium diboride (MgB2)1 presents a new possibility for significant bulk applications2,3,4,5, but many critical issues relevant for practical.
The U.S. Department of Energy's Office of Scientific and Technical Information. Advised by Duwez at California Institute of Technology, "Superconductivity in metal-semiconductor eutectic alloys." Colleagues. Anderson, Carl D.
(Carl David), Both employed at California Institute of Technology. Bateman, Harry, Both employed at California Institute of Technology. Bonner, Tom Wilkerson, a href='./reference/?referenceid=' target='_blank'>27]: C. Ting, D. Talwar, K. Ngai, “Possible Mechanism of Superconductivity Cited by: 4.
1 In the interesting book, Dahl (Dahl, ) has errone ously ascribed the discovery of Type II superconductors to some other article from Kharkov. In reality, as is well known (see 4.
Recog nition), the world s leading specialists in superconductivity unanimously relate this discovery to the articles by kov. William Johnson Harahan has written: 'A search for those elements' -- subject(s): Industrial efficiency, Management, Railroads.
Type 1 superconductors are mainly metals and metalloids that show some conductivity at room temperature. They were the first materials found to exhibit superconductivity.
Mercury was the first element observed to display superconducting properties in They generally require extreme cold before they will become. LP-CVD growth of monolayer Mo 1−x W x S 2 alloys. Different from previous CVD studies in which WO 3 powders were used as the W source, in this study a highly volatile W-containing precursor WCl 6 was chosen.
WCl 6 sublimates at much lower temperature below °C 27,30,40 and the temperature required for WS 2 growth can be reduced to ~ °C, which is Cited by: An alloy capable of exhibiting superconductivity, such as an alloy of niobium and zirconium or an alloy of lead and bismuth.
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.This "Cited by" count includes citations to the following articles in Scholar. The ones marked * may be different from the article in the profile.
Add co-authors Co-authors. Possible mechanism of superconductivity in metal-semiconductor eutectic alloys.
CS Ting, DN Talwar, KL Ngai. Physical Review Letters 45 (14),