scholarly journals Ultrafast magnetic flux dendrite propagation into thin superconducting films

2005 ◽  
Vol 72 (2) ◽  
Author(s):  
B. Biehler ◽  
B.-U. Runge ◽  
P. Leiderer ◽  
R. G. Mints
Keyword(s):  
Magnetic Flux ◽  
Superconducting Films ◽  
Thin Superconducting Films

scholarly journals Motion of Magnetic Flux Quanta in Type-II Superconductors – Some Open Questions

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
R. P. Huebener
Keyword(s):  
Magnetic Flux ◽  
Mixed State ◽  
Particle Density ◽  
Dominant Role ◽  
Volume Ratio ◽  
Superconducting Films ◽  
Type Ii ◽  
Electric Transport ◽  
Thin Superconducting Films ◽  
Non Equilibrium

AbstractThe motion of the magnetic flux quanta in the mixed state of a type-II superconductor, due to the Lorentz force of an electric transport current, represents the key mechanism for generating resistive losses. Whereas the most common result is Joule heating of the superconductor, also purely electronic non-equilibrium effects can play a dominant role in the case of effective cooling of the sample. The latter situation can be realized by means of very thin superconducting films (having a large surface/ volume ratio). In this paper we discuss experiments with Nd2−xCexCuOy (NCCO) films performed some time ago, yielding evidence for electronic non-equilibrium effects due to the energy dependence of the quasi-particle density of states in the mixed state of the films. The films were imbedded within super-fluid helium for cooling. The recent advances in the fabrication of epitaxial ultra-thin superconducting films promise to contribute to further clarification of these electronic non-equilibrium effects.

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.

Electron energy down-conversion in thin superconducting films

2007 ◽  
Vol 75 (9) ◽  
Author(s):  
A. G. Kozorezov ◽  
J. K. Wigmore ◽  
D. Martin ◽  
P. Verhoeve ◽  
A. Peacock
Keyword(s):  
Electron Energy ◽  
Superconducting Films ◽  
Down Conversion ◽  
Thin Superconducting Films

Superconductors with spin–orbit interactions

2016 ◽  
Vol 30 (25) ◽  
pp. 1650183 ◽  
Author(s):  
Yu. N. Ovchinnikov
Keyword(s):  
Magnetic Field ◽  
Superconducting Films ◽  
Critical Magnetic Field ◽  
Spin Orbit ◽  
Zero Temperature ◽  
Interband Pairing ◽  
Two Parameters ◽  
Spin Orbit Interactions ◽  
Parameter Values ◽  
Thin Superconducting Films

The effect of spin-orbit (SO) interaction on the formation of the critical states in thin superconducting films in magnetic field oriented along the film is investigated. Hereby, the case of interband pairing is considered. It was found that eight branches exist in the plane of two parameters [Formula: see text] determined by the value of magnetic field and SO interaction. Six modes leads to inhomogeneous states with different values of the impulse [Formula: see text]. Each state is doubly degenerate over direction of impulse [Formula: see text]. The parameter values at critical point are found for all eight branches in explicit form for zero temperature. The optimal two branches are estimated, corresponding to largest critical magnetic field value for given SO interaction.

Sign in / Sign up

Export Citation Format

Share Document