Resistive state of HTSC film in a varying magnetic field

1998 ◽  
Vol 24 (5) ◽  
pp. 336-338 ◽  
Author(s):  
A. M. Palti ◽  
A. I. Ruban ◽  
A. A. Snarskii
Keyword(s):  
Magnetic Field ◽  
Resistive State ◽  
Htsc Film

scholarly journals Nonlinear Response of a Superconductor of the Bi-Sr-Ca-Cu-O System to an Alternating Magnetic Field in the Superconducting Transition Temperature Range

2018 ◽  
Vol 185 ◽  
pp. 08005
Author(s):  
Alexander Sergeev ◽  
Igor Golev ◽  
Victoria Gvozdevskaya ◽  
Anastasia Barkalova
Keyword(s):  
Magnetic Field ◽  
Nonlinear Response ◽  
Alternating Magnetic Field ◽  
Resistive State ◽  
Superconducting Transition ◽  
Critical Temperatures ◽  
Temperature Range ◽  
Nonlinear Properties ◽  
Current Voltage ◽  
Current Voltage Characteristics

The nonlinear response of the superconductor of the Bi-Sr-Ca-Cu-O system in the temperature range of the superconducting transition under the action of a harmonic alternating magnetic field is experimentally studied. For multiphase superconductors having in their volume regions with distinct critical temperatures, the effect of odd harmonics in the response signal is observed. The contribution of crystallites and the system of weak bonds between the crystallites in the nonlinear response is singled out. It was found that the nonlinear properties of the investigated samples in the resistive state are determined mainly by the nonlinear current-voltage characteristics of the system of weak bonds between the crystallites.

Magnetic field behaviour of the instability currents in resistive state of wide films

Cryogenics ◽  
1992 ◽  
Vol 32 ◽  
pp. 600-603
Author(s):  
V.A. Maltsev ◽  
A.V. Kulikovsky ◽  
H.H. Erganokov
Keyword(s):  
Magnetic Field ◽  
Resistive State ◽  
Field Behaviour

Lorentz microscopy observation of vortex dynamics due to transport current

1995 ◽  
Vol 53 ◽  
pp. 366-367
Author(s):  
T. Yoshida ◽  
H. Kasai ◽  
J.E. Bonevich ◽  
T. Matsuda ◽  
A. Tonomura
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Vortex Dynamics ◽  
Chemical Etching ◽  
Vortex Motion ◽  
Transport Current ◽  
Vortex Pinning ◽  
Resistive State ◽  
Microscopy Observation ◽  
Lorentz Microscopy

At present, Lorentz microscopy is the only one method to visualize individual vortices in superconductors and observe their motion in real time. Using this technique, we have investigated the fascinating vortex dynamics in superconductors, niobium and BSCCO. And recently we applied it to investigate current driven vortex motion.The vortices are driven by the Lorentz force due to the transport current, and begin to move. This couses the vortex to dissipate the energy i.e., causes the resistive state in the superconductor. Therefore to clarify the vortex motion is important especially in the relation with vortex pinning.The sample we examined was niobium thin film, which was single-crystallized by annealing and thinned by chemical etching. It was put in the low temperature specimen stage specially developed for the vortex observation, which was installed in 350 kV FE-TEM based Hitachi H-9000.We observed current driven vortex motion in the temperature (T) range from 4.5 K to Tc = 9.25 K and in a (externally applied) magnetic field (B) up to 100 Gauss.

Directional dependence of magnetic field induced surface resistance in HTSC film

1991 ◽  
Vol 185-189 ◽  
pp. 2305-2306
Author(s):  
Makoto Sato ◽  
Tsuneo Konaka ◽  
Hidefumi Asano
Keyword(s):  
Magnetic Field ◽  
Surface Resistance ◽  
Directional Dependence ◽  
Htsc Film

Magneto-optic study of spatial magnetic-field distribution relaxation in an HTSC film strip after transport current turn-on

1999 ◽  
Vol 41 (6) ◽  
pp. 877-880 ◽  
Author(s):  
M. E. Gaevskii ◽  
D. V. Shantsev ◽  
A. V. Bobyl’ ◽  
Yu. M. Gal’perin ◽  
T. H. Johansen ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Transport Current ◽  
Magnetic Field Distribution ◽  
Turn On ◽  
Htsc Film ◽  
Magneto Optic

Peculiarities of the Resistive State in Mo/Si Superlattices in a Magnetic Field

2003 ◽  
Vol 17 (10n12) ◽  
pp. 627-634 ◽  
Author(s):  
A. Yu. Aladyshkin ◽  
A. Yu. Klimov ◽  
M. A. Kucherenko ◽  
V. V. Kurin ◽  
V. L. Mironov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Temperature Dependence ◽  
Transport Properties ◽  
Transverse Magnetic ◽  
Zero Magnetic Field ◽  
Experimental Investigations ◽  
Resistive State ◽  
Sharp Change ◽  
Superconducting Transition ◽  
Multilayered Structures

The experimental investigations of the transport properties of the superconducting Mo/Si multilayered structures are presented. The observed anisotropy of the electrical resistivity of Mo/Si bridges in a weak magnetic fields H ≲ 5 × 102 Oe is in agreement with the data reported earlier. However, for the Mo/Si microbridges with the width 2 μm in a transverse magnetic field H ≳ 5 × 102 Oe we have found out that the temperature dependence of the in-plane resistivity R(T) demonstrates a sharp change of the resistivity at a certain critical temperature T* < Tc, where Tc is the superconducting transition temperature in a zero magnetic field. For a parallel magnetic field this step-like behavior has not been revealed; we neither observed this effect in wider bridges. The comparison of the transport properties and the nonlinear microwave characteristics is presented. A possible origin of this unusual temperature dependence of R(T) is proposed.

scholarly journals Parallel magnetic field suppresses dissipation in superconducting nanostrips

2017 ◽  
Vol 114 (48) ◽  
pp. E10274-E10280 ◽  
Author(s):  
Yong-Lei Wang ◽  
Andreas Glatz ◽  
Gregory J. Kimmel ◽  
Igor S. Aranson ◽  
Laxman R. Thoutam ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Vortex Motion ◽  
Experimental Studies ◽  
Resistive State ◽  
Parallel Magnetic Field ◽  
Ginzburg Landau ◽  
Type Ii Superconductors ◽  
Large Scale Simulations ◽  
The Magnetic Field

The motion of Abrikosov vortices in type-II superconductors results in a finite resistance in the presence of an applied electric current. Elimination or reduction of the resistance via immobilization of vortices is the “holy grail” of superconductivity research. Common wisdom dictates that an increase in the magnetic field escalates the loss of energy since the number of vortices increases. Here we show that this is no longer true if the magnetic field and the current are applied parallel to each other. Our experimental studies on the resistive behavior of a superconducting Mo0.79Ge0.21 nanostrip reveal the emergence of a dissipative state with increasing magnetic field, followed by a pronounced resistance drop, signifying a reentrance to the superconducting state. Large-scale simulations of the 3D time-dependent Ginzburg–Landau model indicate that the intermediate resistive state is due to an unwinding of twisted vortices. When the magnetic field increases, this instability is suppressed due to a better accommodation of the vortex lattice to the pinning configuration. Our findings show that magnetic field and geometrical confinement can suppress the dissipation induced by vortex motion and thus radically improve the performance of superconducting materials.

Simulation of the resistive state of superconducting films in a magnetic field on the basis of the nonstationary ginzburg-landau equation

1997 ◽  
Vol 40 (1-2) ◽  
pp. 139-151
Author(s):  
P. P. Vysheslavtsev ◽  
V. V. Kurin ◽  
I. M. Nefedov ◽  
I. A. Shereshevsky ◽  
A. A. Andronov
Keyword(s):  
Magnetic Field ◽  
Landau Equation ◽  
Superconducting Films ◽  
Resistive State ◽  
Ginzburg Landau ◽  
Ginzburg Landau Equation
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