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Superconducting properties of the misfit‐layer compound ( SnSe ) 1.18 ( TiSe 2 ) 2
Author(s) -
Song Yoo Jang,
Kim Min Jae,
Jung Wan Gil,
Kim BongJoong,
Rhyee JongSoo
Publication year - 2016
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201552757
Subject(s) - superconductivity , condensed matter physics , magnetization , critical field , coherence length , materials science , anisotropy , crystallite , superconducting coherence length , hysteresis , electrical resistivity and conductivity , magnetic field , physics , optics , quantum mechanics , metallurgy
We report the superconducting properties in the misfit layered compound (SnSe) 1.18 (TiSe 2 ) 2 with critical temperature T c = 3.3 K at ambient pressure. Even though this compound is a polycrystalline compound, it shows anisotropic properties from the X‐ray diffraction, electrical transport, magnetization, and high‐resolution transmission electron microscopy measurements. The anisotropic parameter γ H c 2of the compound is about 1.55 which is obtained from the superconducting parameters of the zero‐temperature‐limit upper critical field H c 2 ( 0 ) and coherence length ξ using the Werthamer–Helfand–Hohenberg (WHH) formula. The small values of specific heat jump Δ C / γ T c and electron–phonon coupling constant λ e − phindicate a weak‐coupling BCS superconductor. The critical current density is exceptionally high (8000 A cm −2 ) compared to other misfit‐layer superconductors. Isothermal hysteresis of magnetization, and critical current density (inset), with respect to the applied magnetic field for various temperatures.