Calculation of the temperature dependent AC susceptibility of superconducting disks

Qin, M.J.; Li, G.; Liu, Huan; Dou, Shi Xue

doi:10.1109/tasc.2003.812537

Cited by 4 publications

(1 citation statement)

References 27 publications

(17 reference statements)

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“…It is important to note that all of the ACMS experiments are performed with H ac and/or H dc fields applied parallel to the c crystal axis; so, we have to consider the experimental configuration as a plate in the perpendicular field. This leads to an extremely distorted field profile in the superconductor, as well as strong geometry effects and a significant demagnetization factor [116]. In the other configuration of the magnetic field applied parallel to the ab plane, the experiments resulted in very weak and noisy signals.…”

Section: Experimental Details and Growth Proceduresmentioning

confidence: 99%

Investigation of the vortex dynamics of Fe_1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

Buchkov

Polichetti

Nenkov

et al. 2015

Supercond. Sci. Technol.

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The superconducting properties of mm-sized Fe1.02Se crystals grown by a flux method are investigated. The structural and morphological features are studied by x-ray diffraction (XRD) and by scanning electron microscopy-energy dispersive x-ray spectroscopy SEM-EDX analysis, which identified a co-growth of a dominant superconducting tetragonal phase, with the minority of a non-superconducting hexagonal phase. The ac magnetic response is analyzed using a combined method of the fundamental and the 3rd harmonic ac magnetic susceptibility as a function of the temperature at different ac magnetic field amplitudes and frequencies and with various superimposed dc fields. The variation of the ac magnetic field and frequency in different ranges especially affects the 3rd harmonic components, which are more sensitive to the changes in the flux dynamic regimes. This allows a fine observation of the evolution of the different linear and non-linear processes responsible for the ac magnetic response of the Fe1.02Se crystals. At low enough ac amplitudes and frequencies, and even in high imposed dc magnetic fields, the Fe1.02Se crystals show a typical critical state behavior, marking a high stability of the pinning, with very small influence of the vortex dynamical processes. With the change of ac field amplitude and frequency a gradual crossover is observed from the initial stable pinning state through the domination of the intermediate regimes as flux creep and finally to the complete dominance of flux flow. The ac magnetic response is also influenced by geometric edge barrier effects arising from the plate-like geometry of the Fe1.02Se crystals. The changes of the dominant irreversible (non-linear) mechanism from surface pinning to bulk pinning or to prevailing dynamical regimes is also identified by analyzing the behavior of the 3rd harmonic components.

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Section: Experimental Details and Growth Proceduresmentioning

confidence: 99%

Investigation of the vortex dynamics of Fe_1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

Buchkov

Polichetti

Nenkov

et al. 2015

Supercond. Sci. Technol.

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The Effect Of Magnetic Relaxation on Ac Susceptibility In Type-II Superconductors

Zhao,

2023

J Supercond Nov Magn

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Effect of viscous flux flow on magnetization and ac susceptibility in type-II superconductors

Zhao¹,

Xi²

2022

Physica C: Superconductivity and its Applications

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Calculation of the temperature dependent AC susceptibility of superconducting disks

Abstract: Index Terms-AC susceptibility, high temperature superconductor, perpendicular and parallel field, pinning potential.

Cited by 4 publications

References 27 publications

Investigation of the vortex dynamics of Fe_1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

Investigation of the vortex dynamics of Fe_1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

The Effect Of Magnetic Relaxation on Ac Susceptibility In Type-II Superconductors

Effect of viscous flux flow on magnetization and ac susceptibility in type-II superconductors

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Calculation of the temperature dependent AC susceptibility of superconducting disks

Abstract: Index Terms-AC susceptibility, high temperature superconductor, perpendicular and parallel field, pinning potential.

Cited by 4 publications

References 27 publications

Investigation of the vortex dynamics of Fe1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

Investigation of the vortex dynamics of Fe1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

The Effect Of Magnetic Relaxation on Ac Susceptibility In Type-II Superconductors

Effect of viscous flux flow on magnetization and ac susceptibility in type-II superconductors

Contact Info

Product

Resources

About

Investigation of the vortex dynamics of Fe_1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis

Investigation of the vortex dynamics of Fe_1.02Se crystals by fundamental and 3rd harmonic ac magnetic susceptibility analysis