Thermally activated hopping of a single Abrikosov vortex

Sanders, S.C.; Sok, Junghyun; Finnemore, D. K.; Li, Qiang

doi:10.1103/physrevb.47.8996

Cited by 11 publications

(11 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4,5 In addition, it was established that an intrinsically pinned vortex will spontaneously start to move around when the superconducting order parameter ⌬ is suppressed to about 20% of the Tϭ0 value ⌬ 0 . 1,6,7 In all of this work, there was no control of the locations where the vortex would move.…”

Section: Introductionmentioning

confidence: 99%

Pinning of a single Abrikosov vortex in superconducting Nb thin films using artificially induced pinning sites

Breitwisch

Finnemore

2000

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

Artificial structures were intentionally introduced into Nb films in order to study the interaction of a single Abrikosov vortex with pinning sites caused by these known defects. A vortex trapped on one of these structures or defects can be induced to move either by thermal depinning or by pushing on the vortex with a transport current in one of the films. The resulting motion, in turn, can be followed by observing the changes in the Fraunhofer-like interference pattern of a cross-strip Josephson junction having the thin film as one leg of the junction. Artificial pinning sites were successfully created by depositing Fe balls on the surface of a previously characterized thin film. Attempts to create artificial pinning sites by depressing the order parameter with a thin strip of Au on the surface of the Nb were not successful. There was no correlation between the location of trapped vortices and the location of the Au line. In a separate measurement, Lorentz-forcedepinning studies for several intrinsic pinning sites in the thin film show that a transport current in the top film will depin a vortex in the top film with about one-tenth the current needed in the bottom film to depin the same vortex.

show abstract

Section: Introductionmentioning

confidence: 99%

Pinning of a single Abrikosov vortex in superconducting Nb thin films using artificially induced pinning sites

Breitwisch

Finnemore

2000

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…(3), Eq. (5). Afterwards, we shall use it to describe the flux exchange and flux relaxation over the entire superconductor.…”

Section: Generalization Of Flux Exchange and Flux Relaxationmentioning

confidence: 99%

Flux Exchange in Inhomogeneous Type-Ii Superconductors

2014

Int. J. Mod. Phys. B

View full text Add to dashboard Cite

The vortex hopping motion in a type-II superconductor determines the current-carrying ability and consequently the application fields of the superconductor. However, it is not clear how the vortices hop between the different pinning regions in the superconductor. Here we proposed that there should be magnetic flux exchange between two contacting pinning regions. A system of differential equations was constructed to describe the flux exchange phenomenon. The qualitative analysis methods were used. The approximate numerical solutions and approximate analytical solutions of the system were obtained. The results show that the flux exchange reduces the internal field in a weak pinning region, but increases the internal field in a strong pinning region. Moreover, the flux exchange phenomenon is strongly influenced by the superconductor's geometrical size.

show abstract

“…Qiang Li [28] made used of a Pb-Al-Also,-PbBi junction in order to further investigate the motion of a single vortex and measure the elementary pinning force in these SNIS junctions. Subsequently, Sanders [29] studied the thermal depinning process in a Pb-Al-Al,O,-PbBi junction and found that the first depinning occurs when the order parameter of the bulk Pb is about 20% of the T = 0 value. Junghyun Sok [30] repeated this experiment for a Nb-Al-Al,O,-Nb junction and found that the corresponding quantity was equal to 24%.…”

Section: List Of Tablesmentioning

confidence: 99%

Influence of a perpendicular magnetic field on the thermal depinning of a single Abrikosov vortex in a superconducting Josephson junction

Kouzoudis

View full text Add to dashboard Cite

Thermally activated hopping of a single Abrikosov vortex

Cited by 11 publications

References 12 publications

Pinning of a single Abrikosov vortex in superconducting Nb thin films using artificially induced pinning sites

Pinning of a single Abrikosov vortex in superconducting Nb thin films using artificially induced pinning sites

Flux Exchange in Inhomogeneous Type-Ii Superconductors

Influence of a perpendicular magnetic field on the thermal depinning of a single Abrikosov vortex in a superconducting Josephson junction

Contact Info

Product

Resources

About