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

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

doi:10.1103/PhysRevB.94.094506

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

Journal Article · Wed Sep 07 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.094506· OSTI ID:1336175

Wang, Aifeng ^[1]; Wu, Lijun ^[1]; Ivanovski, V. N. ^[2]; Warren, J. B. ^[3]; Tian, Jianjun ^[4]; Zhu, Yimei ^[1]; Petrovic, C. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Univ. of Belgrade, Belgrade (Serbia). Institute of Nuclear Sciences Vinca
Brookhaven National Lab. (BNL), Upton, NY (United States). Instrument Division
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Henan Univ., Kaifeng (China). School of Physics and Electronics

Here 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). The J_c is enhanced three 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_0.94Se_0.06 shows contribution of core-normal surfacelike pinning. Lastly, 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 (δl), in contrast to K_xFe_2₋ySe₂ where spatial variations in T_c (δT_c) prevails.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-98CH10886; SC0012704

OSTI ID:: 1336175

Alternate ID(s):: OSTI ID: 1321040

Report Number(s):: BNL--113168-2016-JA; KC0201050; KC0201010

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 9 Vol. 94; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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