Anisotropic transport property anomaly in K0.8Fe1.65Se2 crystal

Man, Teng; Yin, Yuewei; Dong, Sining; Su, T. S.; Zhang, M. J.; Huang, Wen Chen; Li, X. G.

doi:10.1063/1.4871456

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…Teng et al found a dip along the ab-plane orientation due to the formation of kinks in the vortices. This has been related to the possible reduction of intrinsic pinning at a certain temperature because intrinsic pinning due to the layered structure dominates at lower temperatures [28].…”

Section: Correlation Between Nanoscale Defects and Pinning Energymentioning

confidence: 99%

Effective Magnetic Field Dependence of the Flux Pinning Energy in FeSe0.5Te0.5 Superconductor

et al. 2021

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The role of a layered structure in superconducting pinning properties is still at a debate. The effects of the vortex shape, which can assume for example a staircase form, could influence the interplay with extrinsic pinning coming from the specific defects of the material, thus inducing an effective magnetic field dependence. To enlighten this role, we analysed the angular dependence of flux pinning energy U(H,θ) as a function of magnetic field in FeSe0.5Te0.5 thin film by considering the field components along the ab-plane of the crystal structure and the c-axis direction. U(H,θ) has been evaluated from magneto-resistivity measurements acquired at different orientations between the applied field up to 16 T and FeSe0.5Te0.5 thin films grown on a CaF2 substrate. We observed that the U(H,θ) shows an anisotropic trend as a function of both the intensity and the direction of the applied field. Such a behaviour can be correlated to the presence of extended defects elongated in the ab-planes, thus mimicking a layered superconductor, as we observed in the microstructure of the compound. The comparison of FeSe0.5Te0.5 with other superconducting materials provides a more general understanding on the flux pinning energy in layered superconductors.

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Section: Correlation Between Nanoscale Defects and Pinning Energymentioning

confidence: 99%

Effective Magnetic Field Dependence of the Flux Pinning Energy in FeSe0.5Te0.5 Superconductor

et al. 2021

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On the Origin of Enhanced Critical Current Density and Thermal-Activated Flux Flow in K x Fe2−y Se2 Superconductors: the Effect of Quenching and Mn Doping

Fang

2017

J Supercond Nov Magn

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Analysis of pinning in the linear AC response of anisotropic superconductors in oblique magnetic fields

Pompeo

2015

Journal of Applied Physics

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The linear ac response of a pinned vortex system in uniaxial anisotropic superconductors is studied. The physical model for the interpretation of electrical transport experiments in the linear regime with arbitrary angles between the applied magnetic field, the applied current, and the anisotropy axis is provided. In particular, the pinning constant (also known as Labusch parameter) and Campbell resistivity tensors are derived for arbitrary orientations. The applicability to the various tensor quantities of the well-known angular scaling laws for the angular dependence on the field orientation in uniaxial superconductors is commented. Examples of data analysis based on the present results are provided

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Anisotropic transport property anomaly in K0.8Fe1.65Se2 crystal

Cited by 3 publications

References 33 publications

Effective Magnetic Field Dependence of the Flux Pinning Energy in FeSe0.5Te0.5 Superconductor

Effective Magnetic Field Dependence of the Flux Pinning Energy in FeSe0.5Te0.5 Superconductor

On the Origin of Enhanced Critical Current Density and Thermal-Activated Flux Flow in K x Fe2−y Se2 Superconductors: the Effect of Quenching and Mn Doping

Analysis of pinning in the linear AC response of anisotropic superconductors in oblique magnetic fields

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