The importance of thermal gradients on the vortex dynamics and magnetic behavior of mesoscopic superconducting samples

  title={The importance of thermal gradients on the vortex dynamics and magnetic behavior of mesoscopic superconducting samples},
  author={Elwis C. S. Duarte and Alice Presotto and Danilo Okimoto and Vin'icius S. Souto and Edson Sardella and Rafael Zadorosny},
  journal={arXiv: Superconductivity},
Usually, the measurements of electronic and magnetic properties of superconducting samples are carried out under a constant temperature bath. On the other hand, thermal gradients induce local variation of the superconducting order parameter, and the vortex dynamics can present interesting behaviors. In this work, we solved the time-dependent Ginzburg-Landau equations simulating samples under two different thermal gradients, and considering two values of the Ginzburg-Landau parameter, \k{appa… 
3 Citations

Figures from this paper

Manipulation of vortex arrays with thermal gradients by applying dynamic heat sources

In this paper, we investigate the manipulation of vortex arrays of magnetic flux by using dynamic heat sources in the superconducting strip. The time-dependent Ginzburg–Landau (TDGL) equations and…



Effect of sample topology on the critical fields of mesoscopic superconductors

THE superconducting state of a material can be suppressed by either increasing the temperature (T) or applying a magnetic field (H). For bulk samples, the form of the H–T phase boundary is mainly…

Masking effect of heat dissipation on the current-voltage characteristics of a mesoscopic superconducting sample with leads

A theoretical analysis based on a numerical solution of the coupled time-dependent Ginzburg-Landau and heat dissipation equations shows a strong dependence of the critical currents on the applied…

Velocimetry of superconducting vortices based on stroboscopic resonances

A method combining conventional transport measurements and a frequency-tuned flashing pinning potential to obtain reliable estimates of the vortex velocity is introduced, characterized using the time-dependent Ginzburg-Landau formalism.

Direct Observation of Vortex Dynamics in Superconducting Films with Regular Arrays of Defects

The microscopic mechanism of the matching effect in a superconductor, which manifested itself as the production of peaks or cusps in the critical current at specific values of the applied magnetic…

Vortices in a wedge made of a type-I superconductor

Using the time-dependent Ginzburg–Landau approach, we analyze vortex states and vortex dynamics in type-I superconductor films with a thickness gradient in one direction. In the thinnest part of the…

Giant vortex state in perforated aluminum microsquares

We investigate the nucleation of superconductivity in a uniform perpendicular magnetic field H in aluminum microsquares containing a few (2 and 4) submicron holes (antidots). The…

Imaging of super-fast dynamics and flow instabilities of superconducting vortices

A unique scanning microscopy technique is used to image steady-state penetration of super-fast vortices into a superconducting Pb film at rates of tens of GHz and velocities up to tens of km/s, offering an insight into the fundamental physics of dynamic vortex states of superconductors at high current densities.

Numerical Simulation of Vortex Dynamics in Type-II Superconductors

This article describes the results of several numerical simulations of vortex dynamics in type-II superconductors. The underlying mathematical model is the time-dependent Ginzburg?Landau model. The…

Enhanced pinning and proliferation of matching effects in a superconducting film with a Penrose array of magnetic dots

The vortex dynamics in superconducting films deposited on top of a fivefold Penrose array of magnetic dots is studied by means of transport measurements. The authors show that in the low pinning…

Series of maxima in the field dependent magnetic moment of layered superconductors.

These maxima are shown to be closely related to rearrangements of the parallel vortex system, during which an increasing number of vortex chains is formed in the sample.