Large and significantly anisotropic critical current density induced by planar defects in CaKFe4As4 single crystals

Abstract

Three independent components of critical current density, one for the H//c axis and the other two for the H//ab plane, have been studied in CaKFe4As4 single crystals. When the magnetic field is applied along the c axis, we observed fish-tail-like peaks in the M-H hysteresis loop, and the magnetization at higher temperatures exceeds that at lower temperatures at high fields. When the field is applied parallel to the ab plane, a dip structure is observed in the M-H hysteresis loop near the self-field. In addition, for the H//ab plane, we succeeded in separately evaluating the large and significantly anisotropic in-plane and out-of-plane Jc. Transmission electron microscopy revealed the presence of planar defects parallel to the ab plane in CaKFe4As4, which have not been observed in any other iron-based superconductors. We discuss the possible relationship between the anomalous Jc behavior and the planar defects.

arXiv comment19 pages, 8 figures + supplemental material 6 pages, 4 figures To be published in Phys. Rev. B

References in corpus (23)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Nearly Isotropic superconductivity in (Ba,K)Fe2As2
• Vortex phase diagram of Ba(Fe0.93Co0.07)2As2 single crystals
• Superconductivity at T_c ~ 14 K in Single Crystalline FeTe${}_{0.61}$Se${}_{0.39}$
• Fishtail effect and the vortex phase diagram of single crystal Ba0.6K0.4Fe2As2
• Determination of anisotropic Hc2 up to 60 T in (Ba0.55K0.45)Fe2As2 single crystals
• Enhancement of Critical Current Densities in Co-Doped BaFe${}_2$As${}_2$ with Columnar Defects Introduced by Heavy-Ion Irradiation
• Anisotropic thermodynamic and transport properties of single crystalline CaKFe${}_4$As${}_4$
• Enhancement of the superconducting gap by nesting in CaKFe4As4 - a new high temperature superconductor
• Critical State in Thin Anisotropic Superconductors of Arbitrary Shape
• Doping-dependent critical current properties in K, Co, and P-doped BaFe2As2 single crystals
• Temperature dependence and mechanisms for vortex pinning by periodic arrays of Ni dots in Nb films
• Ultra-high critical current densities, the vortex phase diagram and the effect of granularity of the stoichiometric high-Tc superconductor, CaKFe${}_4$As${}_4$
• Optimization of the Crystal Growth of the Superconductor CaKFe${}_4$As${}_4$ from Solution in the FeAs-CaFe${}_2$As${}_2$-KFe${}_2$As${}_2$ System
• Nodeless multiband superconductivity in stoichiometric single crystalline CaKFe${}_4$As${}_4$
• Pressure induced half-collapsed-tetragonal phase in CaKFe${}_4$As${}_4$
• Magnetic fluctuations and superconducting properties of CaKFe4As4 studied by 75As NMR
• Large, Homogeneous, and Isotropic Critical Current Density in Oxygen-Annealed Fe1+yTe0.6Se0.4 Single Crystal
• Trends in pressure-induced layer-selective half-collapsed tetragonal phases in the iron-based superconductor family $AeA$Fe${}_4$As${}_4$
• In-plane magnetic penetration depth of superconducting CaKFe${}_4$As${}_4$
• Asymmetric Field Profile in Bose Glass Phase of Irradiated YBa2Cu3O7-d: Loss of Interlayer Coherence around 1/3 of Matching Field
• Field-driven transition in the Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ superconductor with splayed columnar defects
• Magneto-optical characterizations of FeTe${}_{0.5}$Se${}_{0.5}$ thin films with critical current density over 1 MA/cm${}^2$

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• Expression with self-consistent magnetic units for calculation of critical current density using the Bean's Model
• Synthesis of $c$-axis textured CaKFe${}_4$As${}_4$ superconducting bulk via spark plasma texturing technique
• Evolution of Critical Current Density in CaKFe${}_4$As${}_4$ with La-doping
• Superconductivity of Co-Doped CaKFe4As4 Investigated via Point-Contact Spectroscopy and London Penetration Depth Measurements