12067-55-9Relevant articles and documents
A medium-energy ion scattering investigation of the structure and surface vibrations of two-dimensional YSi2 grown on Si(1 1 1)
Wood,Bonet,Noakes,Bailey,Tear
, p. 120 - 127 (2005)
Medium-energy ion scattering has been used to determine the atomic structure of two-dimensional yttrium silicide on silicon (1 1 1). A full quantitative analysis of the atomic positions of the Si atoms in the top bilayer yields a model similar to that previously suggested in the literature with a Si1-Si2 vertical spacing of 0.80 ± 0.03 A?, but with the Si bilayer relaxed slightly further away from the Y layer (Si2-Y vertical spacing of 1.89 ± 0.02 A?). Observing the effects of the top bilayer vibrations yields a model with significant enhancements.
Thermoelectric Properties of Bulk Yttrium Silicide (YSi2) Fabricated by Arc Melting and Spark Plasma Sintering
Wongprakarn, Suphagrid,Pinitsoontorn, Supree,Tanusilp, Sora-At,Kurosaki, Ken
, (2018)
Yttrium silicide (YSi2) nanoparticles in SiGe are reported to enhance the thermoelectric figure-of-merit (ZT) to the recorded value (≈1.81). However, the thermoelectric properties of bulk YSi2 has never been reported. In this work, the thermoelectric properties of YSi2 is studied for the first time. The bulk YSi2 is fabricated by arc melting highly pure Si and Y raw materials. The ingot is crushed to powder and compacted to form a highly dense pellet by spark plasma sintering. By optimizing the processing parameters, the single phase with the AlB2-type structure (P6/mmm) is formed. The Hall measurements show that YSi2 exhibit a metallic-like behavior with a very high electron concentration. This result in the thermoelectric properties with a very large electrical conductivity (≈18 × 105 Ω?1 m?1) but a small Seebeck coefficient (?26 μV K?1) at room temperature, and decrease with temperature. The thermal conductivity is around 14–19 W m?1 K?1 for all temperature range. The maximum ZT value is 0.026 at 423 K.
Dumbbells of five-connected silicon atoms and superconductivity in the binary silicides MSi3 (M = Ca, Y, Lu)
Schwarz, Ulrich,Wosylus, Aron,Rosner, Helge,Schnelle, Walter,Ormeci, Alim,Meier, Katrin,Baranov, Alexey,Nicklas, Michael,Leipe, Susann,Mueller, Carola J.,Grin, Yuri
, p. 13558 - 13561 (2012/10/08)
The new metastable binary silicides MSi3 (M = Ca, Y, Lu) have been synthesized by high-pressure, high-temperature reactions at pressures between 12(2) and 15(2) GPa and temperatures from 900(100) to 1400(150) K. The atomic patterns comprise int
