scholarly journals Superconducting Transition Temperature, Composition and Lattice Parameter of Y-Ba-Cu-O Films Sputter-Deposited at Low Oxygen Pressure.

1992 ◽  
Vol 27 (5) ◽  
pp. 414-420
Author(s):  
Hiroshi MORITA ◽  
Mitsumasa SUZUKI ◽  
Kumi TAKAHASHI
Keyword(s):  
Transition Temperature ◽  
Oxygen Pressure ◽  
Superconducting Transition Temperature ◽  
Lattice Parameter ◽  
Superconducting Transition ◽  
Low Oxygen ◽  
Sputter Deposited ◽  
Low Oxygen Pressure

Melt Spinning and Phase Transformations of V2CrA11-xBx and Ti3Nb6Mo3Si4 Alloys

1983 ◽  
Vol 21 ◽  
Author(s):  
B.S. Smith ◽  
R.A. Smith ◽  
M T. Clapp
Keyword(s):  
Crystal Structure ◽  
Transition Temperature ◽  
Phase Transformations ◽  
Superconducting Transition Temperature ◽  
Melt Spinning ◽  
Vickers Microhardness ◽  
Lattice Parameter ◽  
Rapid Quenching ◽  
Superconducting Transition

ABSTRACTMelt spinning was used to rapidly quench V2CrA11-xBx and Ti3Nb6Mo3Si4 alloys. Melt spinning had very little effect on the crystal structure of the V2CrA11-xBx alloys. However, a new (NbTiMo)3 Si A–15 phase was found by rapid quenching of the Ti3Nb6Mo3Si4 alloys; the lattice parameter was 5.08 Å. Melt spinning increased the Vickers microhardness values of the V2CrA11-xBx alloys from 500 to 750, and of the Ti3Nb6Mo3Si4 alloys from 1000 to as high as 1675. Melt spinning increased the superconducting transition temperature of the Ti3Nb6Mo3Si4 alloys from 1.9 to 3.4K.

scholarly journals Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5830
Author(s):  
Andrzej Ślebarski ◽  
Maciej M. Maśka
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
High Temperature Superconductors ◽  
Superconducting Phase ◽  
Length Scale ◽  
Superconducting Transition ◽  
Atomic Disorder ◽  
Strong Inhomogeneity ◽  
Related Compounds

We investigated the effect of enhancement of superconducting transition temperature Tc by nonmagnetic atom disorder in the series of filled skutterudite-related compounds (La3M4Sn13, Ca3Rh4Sn13, Y5Rh6Sn18, Lu5Rh6Sn18; M= Co, Ru, Rh), where the atomic disorder is generated by various defects or doping. We have shown that the disorder on the coherence length scale ξ in these nonmagnetic quasiskutterudite superconductors additionally generates a non-homogeneous, high-temperature superconducting phase with Tc⋆>Tc (dilute disorder scenario), while the strong fluctuations of stoichiometry due to increasing doping can rapidly increase the superconducting transition temperature of the sample even to the value of Tc⋆∼2Tc (dense disorder leading to strong inhomogeneity). This phenomenon seems to be characteristic of high-temperature superconductors and superconducting heavy fermions, and recently have received renewed attention. We experimentally documented the stronger lattice stiffening of the inhomogeneous superconducting phase Tc⋆ in respect to the bulk Tc one and proposed a model that explains the Tc⋆>Tc behavior in the series of nonmagnetic skutterudite-related compounds.

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