Showing papers on "High-temperature superconductivity published in 1980"

Advances in cryogenic engineering materials

Abstract: Preface. Editorial. Best Paper Awards. 1999 International Cryogenics Materials Conference Board of Directors. A: Structural and Cryocooler Materials. Mechanical Properties: Austenitic Alloys & Steels. Mechanical Properties: Non-Ferrous Alloys. Mechanical Properties: Structural Composites. Mechanical Properties: Polymers. Mechanical Properties: Ceramics. Physical Properties: Metals, Polymers, Ceramics, & Composites. Magnetic Materials. Testing Methods. B: Superconductors. High Temperature Superconductors: Processing. High Temperature Superconductors: Properties. High Temperature Superconductors: Applications. High Temperature Superconductors: Coated Conductors. Low Temperature Superconductors: NbTi. Low Temperature Superconductors: A-15 Compounds. Low Temperature Superconductors: Ac Losses, Stability, & Current Distribution. Low Temperature Superconducting Cables. Indexes. Author Index. Materials Index. Subject Index.

A-15 compounds and their amorphous counterparts

Abstract: Publisher Summary A15 compounds are known to favor the occurrence of high temperature superconductivity. The amorphous (or higher disordered) state of A15 compounds can be achieved by one of the following techniques: (1) sputtering or co-evaporation onto substrates that are held at relatively low temperatures, (2) by particle irradiation, and (3) by ion mixing. The A15 phase can be recovered from the amorphous or highly disordered state by appropriate thermal annealing. Comparative study of A15 state may lead to a better understanding of superconductivity in the crystalline and the amorphous phases. The irradiation damage of energetic particles in A15 high transition temperature superconductors such as Nb3Ge and Nb3Sn can result in a highly disordered state, which is characterized by a variety of structural defects. Many high transition temperature A15 superconductors such as Nb3Ge and Nb3Sn are characterized by a strong electron–phonon coupling.

Impurities in antiferromagnetic superconductors

Abstract: A study is made of the effect of nonmagnetic impurities on the characteristic properties of antiferromagnetic superconductors. It is shown that the influence of nonmagnetic impurities in such superconductors is analogous to the effect of paramagnetic impurities in ordinary superconductors.

Superconducting Tunneling and Tunneling Applications in High Tc A15 Superconductors.

Abstract: : This program was an outgrowth of our early empirical successes in forming superconducting tunnel junctions on thin films of the high transition temperature superconductors, specifically those in the so-called A15 class such as Nb3Sn (T(c) approx 18 K) and V3Si (T(c) approx 16 K) Prior to this all attempts at tunneling in the A15 superconductors had been on bulk material and were not widely successful Moreover such non-thin film junctions are of limited device interest As a result of this program we now have general junction formation techniques, apparently suitable for the A15 superconductors as a class, which are being routinely used for material diagnostics and for studies of the superconducting properties of these materials More importantly, perhaps, they appear to have important device potential We summarized only the main results and conclusions, referring the reader to the appendix for a more comprehensive discussion