Influence of thermal gradient in vortex states of mesoscopic superconductors

Duarte, Elwis Carlos Sartorelli; Presotto, Alice; Okimoto, Danilo; Sardella, Edson; Zadorosny, Rafael

doi:10.1088/1742-6596/568/2/022011

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…Although the sole existence of these vortex clusters indicates that the vortex-vortex interaction is not monotonic, by making use of the constrained GL formalism which fixes the vortex positions [14], we explicitly show that the thermal gradients give rise to a non-monotonic vortex-vortex interaction. The results of the present work are not only of fundamental interest, once it extends previous works on the properties of vortex interactions to systems with a non-homogeneous temperature distributions, but may also be of practical interest, given that this type of thermal gradient could be used to control the vortex matter of superconducting samples [13]. Furthermore, local thermal gradients have already been suggested as a possible route for a series of applications, such as the induction of an open circuit voltage in the absence of an applied current [15] and vortex ratchet effect [16,17].…”

Section: Introductionsupporting

confidence: 64%

“…As in the case of the thin films described above, the nonmonotonic interaction reported here does not rely on non-local effects which have already been found in the standard GL formalism. The effects of a thermal gradient on the vortex matter were previously studied [12,13] and shown to develop mainly from a pinning of the vortices in the hotter regions and from an asymmetric penetration of vortices due to the lower penetration field in the sample side with higher temperature.…”

Section: Introductionmentioning

confidence: 99%

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Clusters of vortices induced by thermal gradient in mesoscopic superconductors

et al. 2021

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Section: Introductionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Clusters of vortices induced by thermal gradient in mesoscopic superconductors

et al. 2021

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“…Such a behavior means that the vortices begin to be influenced by the surfaces. Other characteristics of mesoscopic superconductors can be found in [6][7][8][9][10][11][12][13], and references therein.…”

Section: Introductionmentioning

confidence: 99%

Influence of surface defects on the vortex penetration and arrangement at mesoscopic superconducting samples

Benites,

Presotto,

Barba-Ortega

et al. 2024

J. Phys.: Conf. Ser.

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All superconductor applications lie on carry dissipationless current; however, in the presence of external magnetic fields, including the self-field, vortices penetrate the sample, and their dissipative motion generates resistive states. Thus, once the superconducting state survives for higher magnetic fields due to the presence of vortices, those specimens cannot move to increase the material’s critical current density; thus, in this work, we studied the influence of surface defects on the vortex penetration at square mesoscopic superconducting materials using the time-dependent Guinzburg-Landau framework. The lateral size of the samples was 12 times the coherence length at zero Kelvin, with defects distributed in two opposite borders. The main result showed that the currents crowd around the surface defects are responsible for vortex penetration at 60% of critical temperature.

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“…As mentioned above, the thermal effect is another interesting point for the vortex matter. The thermal gradient is an effective method to control the vortex dynamics [15,34,35]. The energy dissipation caused by the vortex motion can lead to a local temperature rise [36][37][38], and even macroscopic thermomagnetic instabilities [39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Yong

Zhou

2021

Supercond. Sci. Technol.

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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 the heat diffusion equation are numerically solved to study the effect of the dynamic heat sources and the vortex dynamics of the sample. Three distinct velocity ranges were shown to occur, depending on the vortex motion and the corresponding characteristics of the induced voltage. Due to the relationship among the driving force, viscous force, and vortex–vortex interaction, the vortex motion changes from direct motion to a roughly harmonic motion with the velocity of the heat source. Meanwhile, the electromagnetic performance of the sample is also related to the heat source parameters, the applied magnetic fields and the pinning centers. In addition, the thermal effect leads to a more complex non-linear relationship between the induced voltage and the heat source velocity.

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Influence of thermal gradient in vortex states of mesoscopic superconductors

Cited by 5 publications

References 16 publications

Clusters of vortices induced by thermal gradient in mesoscopic superconductors

Clusters of vortices induced by thermal gradient in mesoscopic superconductors

Influence of surface defects on the vortex penetration and arrangement at mesoscopic superconducting samples

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

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