Presentation Information
[PCP1-10]Effect of Element Substitution on the Physical Properties in the misfit layered compound (BiSe)m(TaSe2)n
*Ryonosuke Nakata1, Shogo Kuwahara1, Tadataka Watanabe1, Satoshi Demura1 (1. CST Nihon Univ. (Japan))
Keywords:
Superconductivity,Misfit layered compounds,Element substitution
Misfit layered compounds, denoted by [(MX)1+δ]m(TX2)n (M: Pb, Bi, Sn, and rare earth, T: transition metals, X: S, Se), consist of alternating stacking of m insulating MX layers and n conducting TX2 layers, stacked through van der Waals force. Partial materials belonging to this compound exhibit superconductivity, and their superconducting transition temperature (Tc) varies depending on the number of m and n. For (BiSe)1.10(NbSe2), Tc is approximately 2.7 K, and the upper critical field (μ0Hc2) differs depending on the in-plane crystal axis [1]. We have examined electron carrier doping by
substituting Ag for the Bi site in this compound and found that Ag substitution varied both Tc and μ0Hc2.
In this study, we investigated the effect of Ag substitution at the Bi site on the superconducting properties of (BiSe)(TaSe2)n single crystals to determine whether Ag can be substituted in materials with other TX2 layers. These single crystals were grown using the flux method. As a result, obtained crystals were evaluated by the X-ray diffraction (XRD), elemental composition analysis and temperature and magnetic field dependent resistivity measurements. XRD measurements revealed that
the (00l) peaks of the Ag-substituted samples shifted toward higher angles, indicating lattice constant along the c-axis decreased accordingly (Fig.1). Furthermore, compositional analysis confirmed the presence of Ag in the crystals. In the presentation, we will introduce and discuss the changes in the
superconducting properties by Ag-substitution.
substituting Ag for the Bi site in this compound and found that Ag substitution varied both Tc and μ0Hc2.
In this study, we investigated the effect of Ag substitution at the Bi site on the superconducting properties of (BiSe)(TaSe2)n single crystals to determine whether Ag can be substituted in materials with other TX2 layers. These single crystals were grown using the flux method. As a result, obtained crystals were evaluated by the X-ray diffraction (XRD), elemental composition analysis and temperature and magnetic field dependent resistivity measurements. XRD measurements revealed that
the (00l) peaks of the Ag-substituted samples shifted toward higher angles, indicating lattice constant along the c-axis decreased accordingly (Fig.1). Furthermore, compositional analysis confirmed the presence of Ag in the crystals. In the presentation, we will introduce and discuss the changes in the
superconducting properties by Ag-substitution.