Synthesis of Thin Niobium Films on Silicon and Study of Their Superconducting Properties in the Dimensional Crossover Region

2021 ◽  
Vol 66 (2) ◽  
pp. 263-268
Author(s):  
I. V. Yanilkin ◽  
A. I. Gumarov ◽  
A. M. Rogov ◽  
R. V. Yusupov ◽  
L. R. Tagirov
Keyword(s):  
Dimensional Crossover ◽  
Superconducting Properties ◽  
Crossover Region

JOSEPHSON COUPLING STRENGTHS AND OVERLAPPING OF DIMENSIONS IN THE CROSSOVER REGION IN IRRADIATED MULTIPERIODIC HIGH-Tc SUPERCONDUCTORS

2000 ◽  
Vol 14 (12) ◽  
pp. 423-436
Author(s):  
A. K. GHOSH ◽  
A. N. BASU
Keyword(s):  
Structural Modification ◽  
Josephson Coupling ◽  
Dimensional Crossover ◽  
High Tc Superconductors ◽  
Crossover Region ◽  
Normal State Resistivity ◽  
High Tc ◽  
Breaking Parameter ◽  
Coupling Strengths ◽  
Α Particles

We have bombarded (Bi,Pb)-2223 superconductors with 40 MeV α-particles to study the effect of irradiation on the dimensional crossover in fluctuation-induced conductivity. The pair-breaking parameter decreases with the irradiation and suppression of the critical temperature is obtained. The structural modification of the layer in the high-T c superconductors induced by irradiation affects the extent of the overlapping region in the process of dimensional crossover. The width of the overlapping regime is evaluated for the various doses of irradiation using the different possible relations for the normal state resistivity. The variation of the transition width (Δ T0) with the increase in dose of irradiation is discussed in terms of modifications of interlayer and intralayer Josephson coupling strengths.

Variable-Rung Design for a Mixed-Valence Two-Legged Ladder System Situated in a Dimensional Crossover Region

2014 ◽  
Vol 53 (2) ◽  
pp. 1229-1240 ◽  
Author(s):  
Kazuya Otsubo ◽  
Atsushi Kobayashi ◽  
Kunihisa Sugimoto ◽  
Akihiko Fujiwara ◽  
Hiroshi Kitagawa
Keyword(s):  
Mixed Valence ◽  
Dimensional Crossover ◽  
Crossover Region ◽  
Ladder System

Superconducting Properties of v/cr Artificial Metallic Superlattices

1986 ◽  
Vol 77 ◽  
Author(s):  
B. M. Davis ◽  
J. Q. Zheng ◽  
M. R. Ma ◽  
B. Y. Jin ◽  
J. E. Hilliard ◽  
...  
Keyword(s):  
Proximity Effect ◽  
High Vacuum ◽  
Upper Critical Field ◽  
Ultra High Vacuum ◽  
Vacuum System ◽  
Zero Field ◽  
Dimensional Crossover ◽  
Superconducting Properties ◽  
Sapphire Substrates ◽  
Field Transition

ABSTRACTWe have studied the superconducting properties of V/Cr superlattices. Superlattices of V100Crx, V150Crx, and V200Crx, with x varying between 3 and 80 atomic planes have been prepared. The films have a strong (110) texture and were grown on sapphire substrates at 250°C in an ultra-high vacuum system. The zero field transition temperature of the V150Crx and V200Crx, but not the V100Crx films have been adequately modeled using Werthamer's theory for proximity effect coupled films. The films have a dimensional crossover in the parallel upper critical field when the thickness of the Cr layers is about 60 atomic planes.

The Influence of Fluctuations on the Superconducting Properties of Bi2Sr2Ca0.6Zn0.4Cu2OX and Bi2Sr2Ca1Cu2OX

2016 ◽  
Vol 845 ◽  
pp. 17-20 ◽  
Author(s):  
S.S. Ragimov ◽  
A.A. Saddinova ◽  
V.M. Aliev ◽  
R.I. Selim-Zade
Keyword(s):  
Superconducting State ◽  
Thermal Power ◽  
Interlayer Coupling ◽  
Dimensional Crossover ◽  
Zero Temperature ◽  
Crossover Temperature ◽  
Superconducting Properties ◽  
Specific Resistivity ◽  
Strong Anisotropy ◽  
Ca Substitution

It was investigated the influence of Ca substitution by Zn on the fluctuations of specific resistivity, thermal power and exsess conductivity of Bi2Sr2Ca0.6Zn0.4Cu2OX and Bi2Sr2Ca1Cu2OX in the 70-300К temperature interval. Experimental results explained taking into account strong anisotropy and multiband character of superconducting state in these compounds. The microscopic parameters such as dimensional crossover temperature (Tcr), interlayer coupling strength (J), and zero temperature coherence length along c axis (ξ0) are estimated.

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.

Flux Lattice Melting and Dimensional Crossover in Bi-2212 Single Crystals

1996 ◽  
Vol 6 (12) ◽  
pp. 2327-2354 ◽  
Author(s):  
P. H. Kes ◽  
H. Pastoriza ◽  
T. W. Li ◽  
R. Cubitt ◽  
E. M. Forgan ◽  
...  
Keyword(s):  
Single Crystals ◽  
Dimensional Crossover ◽  
Flux Lattice

SUPERCONDUCTING PROPERTIES OF IRIDIUM THIN FILMS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-608-C6-609
Author(s):  
L. B. Holdeman ◽  
R. J. Soulen ◽  
Jr ◽  
T. F. Finnegan ◽  
P. N. Peters
Keyword(s):  
Thin Films ◽  
Superconducting Properties
Sign in / Sign up

Export Citation Format

Share Document