The synthesis and crystallographic, thermodynamic and transport properties of single crystalline Rh9In4S4 were studied. The resistivity, magnetization and specific heat measurements all clearly indicate bulk superconductivity with a critical temperature, Tc ∼ 2.25 K. The Sommerfeld coefficient γ and the Debye temperature(ΘD) were found to be 34 mJ mol −1 K −2 and 217 K respectively. The observed specific heat jump, ∆C/γTc = 1.66, is larger than the expected BCS weak coupling value of 1.43. Ginzburg-Landau (GL) ratio of the low temperature GL-penetration depth, λGL≈ 5750Å5750Å, to the GL-coherence length, ξGL≈ 94Å94Å, is large: κ ∼ 60. Furthermore, we observed a peak effect in the resistivity measurement as a function of both temperature and magnetic field.
The phenomenon of polarization photosensitivity of CuInSe2/CdS thin film heterojunctions due to anisotropic transmission of linear polarized radiation (LPR) through the air-CdS polycrystalline film interface was detected. The parameters of polarization photosensitivity are shown as functions of the angle of oblique incidence θ and the incident photon energy LPR. The induced photopleochroism coefficient P increased with increasing angle in accordance with the law P=θ2, and at θ≃80° it reached 64%. As follows from polarization measurements photosensitivity, CuInSe2/CdS thin films heterostructures can be used as broadband LPR photoanalysers.
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