Critical current density and mechanism of vortex pinning in KxFe2-ySe₂ doped with S

Lei, Hechang; Petrovic, C.

doi:10.1103/PhysRevB.84.052507

Title: Critical current density and mechanism of vortex pinning in K_xFe_2-ySe₂ doped with S

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.84.052507· OSTI ID:1100554

Lei, Hechang; Petrovic, C.

We report the critical current density J_c in K_xFe_2-ySe_2-zS_z crystals. The J_c can be enhanced significantly with optimal S doping (z=0.99). For K_0.70(7)Fe_1.55(7)Se_1.01(2)S_0.99(2), the weak fishtail effect is found for H II c. The normalized vortex pinning forces follow the scaling law with a maximum position at 0.41 of the reduced magnetic field. These results demonstrate that the small size normal point defects dominate the vortex pinning mechanism.

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Sponsoring Organization:: USDOE

OSTI ID:: 1100554

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Vol. 84 Journal Issue: 5; ISSN 1098-0121

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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References (21)

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