scholarly journals Superconducting properties of mesoscopic cylinders with enhanced surface superconductivity

2001 ◽  
Vol 65 (2) ◽  
Author(s):  
B. J. Baelus ◽  
S. V. Yampolskii ◽  
F. M. Peeters ◽  
E. Montevecchi ◽  
J. O. Indekeu
Keyword(s):  
Superconducting Properties ◽  
Surface Superconductivity ◽  
Enhanced Surface

Superconducting phase transitions in thin mesoscopic rings with enhanced surface superconductivity

2006 ◽  
Vol 74 (2) ◽  
Author(s):  
Guo-Qiao Zha ◽  
Shi-Ping Zhou ◽  
Bao-He Zhu ◽  
Yao-Ming Shi ◽  
Hong-Wei Zhao
Keyword(s):  
Phase Transitions ◽  
Superconducting Phase ◽  
Surface Superconductivity ◽  
Enhanced Surface

scholarly journals Enhanced surface superconductivity in Ba(Fe0.95Co0.05)2As2

2020 ◽  
Vol 116 (6) ◽  
pp. 062601
Author(s):  
Christopher T. Parzyck ◽  
Brendan D. Faeth ◽  
Gordon N. Tam ◽  
Gregory R. Stewart ◽  
Kyle M. Shen
Keyword(s):  
Surface Superconductivity ◽  
Enhanced Surface

Characterization of Y-Ba-Cu-O films grown on silicon substrates by sequential evaporation

1988 ◽  
Vol 46 ◽  
pp. 866-867
Author(s):  
E. L. Hall ◽  
A. Mogro-Campero ◽  
L. G. Turner ◽  
N. Lewis
Keyword(s):  
Thin Film ◽  
Thin Film Deposition ◽  
Superconducting Films ◽  
Electron Beam Evaporation ◽  
Film Deposition ◽  
Silicon Substrates ◽  
Superconducting Properties ◽  
Sequential Electron ◽  
Thin Superconducting Films

There is great interest in the growth of thin superconducting films of YBa2Cu3Ox on silicon, since this is a necessary first step in the use of this superconductor in a variety of possible electronic applications including interconnects and hybrid semiconductor/superconductor devices. However, initial experiments in this area showed that drastic interdiffusion of Si into the superconductor occurred during annealing if the Y-Ba-Cu-O was deposited direcdy on Si or SiO2, and this interdiffusion destroyed the superconducting properties. This paper describes the results of the use of a zirconia buffer layer as a diffusion barrier in the growth of thin YBa2Cu3Ox films on Si. A more complete description of the growth and characterization of these films will be published elsewhere.Thin film deposition was carried out by sequential electron beam evaporation in vacuum onto clean or oxidized single crystal Si wafers. The first layer evaporated was 0.4 μm of zirconia.

Processing and characterization of YBa2Cu3O7−x/Ag composites

1990 ◽  
Vol 48 (4) ◽  
pp. 46-47
Author(s):  
Jafar Javadpour ◽  
Bradley L. Thiel ◽  
Sarikaya Mehmet ◽  
Ilhan A. Aksay
Keyword(s):  
Composite System ◽  
Precursor Solution ◽  
Microstructural Development ◽  
Superconducting Properties ◽  
Practical Applications ◽  
Nitrate Precursor ◽  
Cold Pressed ◽  
Tape Cast ◽  
Composite Samples

Practical applications of bulk YBa2Cu3O7−x materials have been limited because of their inadequate critical current density (jc) and poor mechanical properties. Several recent reports have indicated that the addition of Ag to the YBa2Cu3O7−x system is beneficial in improving both mechanical and superconducting properties. However, detailed studies concerning the effect of Ag on the microstructural development of the cermet system have been lacking. Here, we present some observations on the microstructural evolution in the YBa2Cu3O7−x/Ag composite system.The composite samples were prepared by mixing various amounts (2.5 - 50 wt%) AgNO3 in the YBa2Cu3O7−x nitrate precursor solution. These solutions were then spray dried and the resulting powders were either cold pressed or tape cast. The microstructures of the sintered samples were analyzed using SEM (Philips 515) and an analytical TEM (Philips 430T).The SEM micrographs of the compacts with 2.5 and 50 wt% Ag addition sintered at 915°C (below the melting point of Ag) for 1 h in air are displayed in Figs. 1 and 2, respectively.

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