Critical current density and vortex pinning in tetragonal FeS$_{1-x}$Se$_{x}$ ($x=0,0.06$)

Aifeng Wang; Lijun Wu; V. N. Ivanovski; J. B. Warren; Jianjun Tian; Yimei Zhu; C. Petrovic

doi:10.1103/PhysRevB.94.094506

paper

Critical current density and vortex pinning in tetragonal FeS $_{1 - x}$ Se $_{x}$ ( $x = 0, 0.06$ )

arXiv:1605.09791 · doi:10.1103/PhysRevB.94.094506

Abstract

We report critical current density ( $J_{c}$ ) in tetragonal FeS single crystals, similar to iron based superconductors with much higher superconducting critical temperatures ( $T_{c}$ 's). The $J_{c}$ is enhanced 3 times by 6\% Se doping. We observe scaling of the normalized vortex pinning force as a function of reduced field at all temperatures. Vortex pinning in FeS and FeS $_{0.94}$ Se $_{0.06}$ shows contribution of core-normal surface-like pinning. Reduced temperature dependence of $J_{c}$ indicates that dominant interaction of vortex cores and pinning centers is via scattering of charge carriers with reduced mean free path ( $δ$ $l$ ), in contrast to K $_{x}$ Fe $_{2 - y}$ Se $_{2}$ where spatial variations in $T_{c}$ ( $δ$ $T_{c}$ ) prevails.

arXiv comment5 pages, 4 figures

Critical current density and vortex pinning in tetragonal FeS $_{1 - x}$ Se $_{x}$ ( $x = 0, 0.06$ )

Abstract

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Critical current density and vortex pinning in tetragonal FeS1−x​Sex​ (x=0,0.06)

Abstract

References in corpus (27)

Cited by in corpus (10)

Critical current density and vortex pinning in tetragonal FeS $_{1 - x}$ Se $_{x}$ ( $x = 0, 0.06$ )