Flux-cutting and flux-transport effects in type-II superconductor slabs in a parallel rotating magnetic field

Cortés-Maldonado, R.; Espinosa-Rosales, J.E.; Carballo-Sánchez, A. F.; Pérez-Rodrı́guez, F.

doi:10.1063/1.3672157

Cited by 5 publications

(8 citation statements)

References 37 publications

(98 reference statements)

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“…Measurements of the London field in terrestrial superconductors have been performed in metallic, 335 high-temperature 336 and heavy-fermion 337 systems. However (apart from a few exceptions [338][339][340] ) most experiments investigating the dynamics of fluxtubes are performed with static films and non-rotating external fields, thus not providing information about the influence of rotation on the superconductor's properties. For these two reasons, the following discussion primarily concerns aspects which could help to improve our knowledge of mesoscopic neutron star physics.…”

Section: Fluxtube Dynamicsmentioning

confidence: 99%

Neutron stars in the laboratory

Graber

Andersson

Hogg

2017

Int. J. Mod. Phys. D

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Neutron stars are astrophysical laboratories of many extremes of physics. Their rich phenomenology provides insights into the state and composition of matter at densities which cannot be reached in terrestrial experiments. Since the core of a mature neutron star is expected to be dominated by superfluid and superconducting components, observations also probe the dynamics of large-scale quantum condensates. The testing and understanding of the relevant theory tends to focus on the interface between the astrophysics phenomenology and nuclear physics. The connections with low-temperature experiments tend to be ignored. However, there has been dramatic progress in understanding laboratory condensates (from the different phases of superfluid helium to the entire range of superconductors and cold atom condensates). In this review, we provide an overview of these developments, compare and contrast the mathematical descriptions of laboratory condensates and neutron stars and summarise the current experimental state-of-the-art. This discussion suggests novel ways that we may make progress in understanding neutron star physics using low-temperature laboratory experiments.

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Section: Fluxtube Dynamicsmentioning

confidence: 99%

Neutron stars in the laboratory

Graber

Andersson

Hogg

2017

Int. J. Mod. Phys. D

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“…Panel (b) in figure 1 exhibits the curves of the average magnetization M z ( M z = B z /µ 0 ) versus the external magnetic field H y , which were calculated by employing the original elliptic model. In the calculation, we used the perpendicular component of the critical current density, J c⊥ (B), which was determined in our previous work [34] from the standard magnetization curve [35] for the same PbBi sample:…”

Section: Remanent-magnetization Suppression By a Transverse Fieldmentioning

confidence: 99%

“…The results obtained in the experimental work [33] have motivated us to investigate how the parameter r, used within the EECSM, influences the magnetic response of hard superconductors subjected to rotating and crossed fields. In a previous work [34], the magnetic response of an irreversible type-II superconductor slab subjected to an in-plane rotating magnetic field was investigated with Bean's model and the OECSM, EECSM, and GDCSM. The comparison of the predictions of these critical-state models with experimental measurements of magnetization for a rotating PbBi disk in a fixed magnetic field [35] has shown that the OECSM can reproduce the main characteristics of the magnetization curves.…”

Section: Introductionmentioning

confidence: 99%

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On the extended elliptic critical-state model for hard superconductors

Cortés-Maldonado

Peña-Seaman

Garcı́a-Vázquez

et al. 2013

Supercond. Sci. Technol.

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The magnetic behavior of an irreversible type-II superconducting slab under the action of in-plane crossed fields is investigated within both the original elliptic critical-state model and the extended one, which was recently proposed by Clem. In particular, we study the suppression of the remanent magnetization of a PbBi specimen by a sweeping external transverse magnetic field. It is found that both elliptic critical-state models reproduce the main features of available experimental magnetization curves. We also show that the average magnetizations, corresponding to diamagnetic and paramagnetic initial states at a static bias field H z , are asymmetrically reduced by the action of an oscillating transverse field H y . If the amplitude of the oscillations of H y is as large as the first penetration field H P , the resulting state becomes paramagnetic after various cycles of H y . Such a kind of paramagnetism is attributed to the anisotropy, induced by flux-line cutting effects, in the critical current density. In PbBi samples, paramagnetism is expected to be manifest in a wide range of values of the static bias field H z .

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“…In this chapter, we have shown that the ECSM satisfactorily reproduces the response of type-II superconductors subjected to external magnetic field varying in magnitude and directionwhen the flux-line cutting effect is considered. Following this line of research, and based on recently results reported [32,35,36], the effects of the flux transport will be studied, as well as energy dissipation. This can be achieved incorporating an electric field with a well-defined direction.…”

Section: Conclusion and Expectationsmentioning

confidence: 99%