Brief Introduction to Flux Pinning and Vortex Dynamics in High

doi:10.7498/aps.70.20201881

Flux pinning and vortex dynamics in MgB2 doped with TiO2 and SiC inclusions

Low Temperature Physics ◽

10.1063/1.3151990 ◽

2009 ◽

Vol 35 (6) ◽

pp. 439-448 ◽

Cited By ~ 2

Author(s):

V. G. Prokhorov ◽

G. G. Kaminsky ◽

V. L. Svetchnikov ◽

J. S. Park ◽

T. W. Eom ◽

...

Keyword(s):

Vortex Dynamics ◽

Flux Pinning

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Flux Pinning and Vortex Dynamics inK3C60Crystals

Japanese Journal of Applied Physics ◽

10.1143/jjap.36.105 ◽

1997 ◽

Vol 36 (Part 1, No. 1A) ◽

pp. 105-109

Author(s):

Ming-Way Lee ◽

Jen-Bin Shi ◽

Chun-Shan Chen

Keyword(s):

Vortex Dynamics ◽

Flux Pinning

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Second magnetization peak effect, vortex dynamics and flux pinning in 112-type superconductor Ca0.8La0.2Fe1−xCoxAs2

Scientific Reports ◽

10.1038/srep22278 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 46

Author(s):

Wei Zhou ◽

Xiangzhuo Xing ◽

Wenjuan Wu ◽

Haijun Zhao ◽

Zhixiang Shi

Keyword(s):

Vortex Dynamics ◽

Flux Pinning ◽

Peak Effect ◽

Second Magnetization Peak

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Flux pinning and vortex dynamics in high Tc superconducting films

Cryogenics ◽

10.1016/0011-2275(93)90246-k ◽

1993 ◽

Vol 33 (5) ◽

pp. 514-518 ◽

Cited By ~ 2

Author(s):

V.G. Prokhorov ◽

G.G. Kaminsky ◽

Ya.A. Petrukhno ◽

A.L. Kasatkin ◽

M.A. Kuznetsov ◽

...

Keyword(s):

Vortex Dynamics ◽

Flux Pinning ◽

Superconducting Films ◽

High Tc

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Pressure effects on iron-based superconductor families: Superconductivity, flux pinning and vortex dynamics

Materials Today Physics ◽

10.1016/j.mtphys.2021.100414 ◽

2021 ◽

Vol 19 ◽

pp. 100414

Author(s):

L.N. Sang ◽

Z. Li ◽

G.S. Yang ◽

Z.J. Yue ◽

J.X. Liu ◽

...

Keyword(s):

Vortex Dynamics ◽

Flux Pinning ◽

Pressure Effects ◽

Iron Based

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Interfacial studies in Nb3Sn superconductors

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100087264 ◽

1991 ◽

Vol 49 ◽

pp. 590-591

Author(s):

Ernest L. Hall ◽

Lee E. Rumaner ◽

Mark G. Benz

Keyword(s):

Grain Size ◽

Grain Boundaries ◽

Flux Pinning ◽

Size Control ◽

High Magnetic Fields ◽

Type Ii ◽

Reaction Interface ◽

Liquid Diffusion ◽

Type Ii Superconductor ◽

Grain Size Control

The intermetallic compound Nb3Sn is a type-II superconductor of interest because it has high values of critical current density Jc in high magnetic fields. One method of forming this compound involves diffusion of Sn into Nb foil containing small amounts of Zr and O. In order to maintain high values of Jc, it is important to keep the grain size in the Nb3Sn as small as possible, since the grain boundaries act as flux-pinning sites. It has been known for many years that Zr and O were essential to grain size control in this process. In previous work, we have shown that (a) the Sn is transported to the Nb3Sn/Nb interface by liquid diffusion along grain boundaries; (b) the Zr and O form small ZrO2 particles in the Nb3Sn grains; and (c) many very small Nb3Sn grains nucleate from a single Nb grain at the reaction interface. In this paper we report the results of detailed studies of the Nb3Sn/Nb3Sn, Nb3Sn/Nb, and Nb3Sn/ZrO2 interfaces.

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The stability of dislocation networks under various oxygen-doping conditions in superconducting Bi2Sr2CaCu2Oy single crystals and their influence on the flux pinning properties

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100171742 ◽

1994 ◽

Vol 52 ◽

pp. 802-803

Author(s):

Y. Feng ◽

X. Y. Cai ◽

R. J. Kelley ◽

D. C. Larbalestier

Keyword(s):

Single Crystals ◽

Oxygen Content ◽

Basal Plane ◽

Flux Pinning ◽

Pinning Centers ◽

Before And After ◽

Anomalous Peak ◽

Basal Plane Dislocation ◽

The Stability ◽

Further Development

The issue of strong flux pinning is crucial to the further development of high critical current density Bi-Sr-Ca-Cu-O (BSCCO) superconductors in conductor-like applications, yet the pinning mechanisms are still much debated. Anomalous peaks in the M-H (magnetization vs. magnetic field) loops are commonly observed in Bi2Sr2CaCu2Oy (Bi-2212) single crystals. Oxygen vacancies may be effective flux pinning centers in BSCCO, as has been found in YBCO. However, it has also been proposed that basal-plane dislocation networks also act as effective pinning centers. Yang et al. proposed that the characteristic scale of the basal-plane dislocation networksmay strongly depend on oxygen content and the anomalous peak in the M-H loop at ˜20-30K may be due tothe flux pinning of decoupled two-dimensional pancake vortices by the dislocation networks. In light of this, we have performed an insitu observation on the dislocation networks precisely at the same region before and after annealing in air, vacuumand oxygen, in order to verify whether the dislocation networks change with varying oxygen content Inall cases, we have not found any noticeable changes in dislocation structure, regardless of the drastic changes in Tc and the anomalous magnetization. Therefore, it does not appear that the anomalous peak in the M-H loops is controlled by the basal-plane dislocation networks.

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