Raman scattering study of antimony-based skutterudites

Abstract

Articles you may be interested inPlasma dispersion effect in heavily doped antimony-based passive optical waveguides Appl. Phys. Lett. 92, 203508 (2008); 10.1063/1.2936298 Two-dimensional photonic crystals in antimony-based films fabricated by holography -earth ions occupy the voids in the skutterudite structure. These void-filling ions interact with some of the lattice vibrations in this structure and produce a shift and broadening of the observed lines. The most prominent lines in all of the samples are the Sb 4 ring-breathing modes.

High-Pressure Synthesis, Structure, and Magnetic Properties of Ge-Substituted Filled Skutterudite Compounds; LnxCo4Sb12−yGey, Ln = La, Ce, Pr, and Nd

“…This means that the size of the unit cell is determined mainly by the covalent connection in the Co-(Sb,Ge) host network. Similar behavior was observed for the lattice constants of LnRh 4 Sb 9 Ge 3 , Ln = La, Ce, Pr, and Nd [10]. The lattice constants for those Rh compounds were in a very narrow range from 9.112 to 9.107 Å.…”

“…Nolas et al reported the first filled skutterudite compounds containing group 14 elements in the M site, LnIr 4 Sb 9 Ge 3 , Ln = La, Nd, and Sm. In these compounds, the electrons from the guest trivalent cations compensate for the electron deficiency of the host network caused by the substitution of a group 14 element for the group 15 element [10][11][12]. We also prepared a series of Ge-substituted filled skutterudite compounds LnRh 4 Sb 9 Ge 3 , Ln = La, Ce, Pr, and Nd, using high-pressure and high-temperature reactions [13].…”

Structural Instability of Unfilled Skutterudite CompoundsMX3(M= Co, Rh, and Ir;X= As and Sb) under High Pressure

“…The values listed in Table I as volumes are consistent with those previously reported. 12,16,17) The X-ray diffraction experiments under high pressures, using synchrotron radiation, were performed at the beamline BL-18C at the KEK Photon Factory (Tsukuba, Japan). The incident beam was monochromatized by Si(111) double crystals.…”

Electrical and magnetic properties of La0.5Rh4Sb12 filled skutterudite synthesized at high pressure

“…The corresponding unfilled skutterudites are similarly classified; an unfilled skutterudite RhP 3 , which corresponds to La 0.6 Rh 4 P 12 , has been experimentally determined to be a metal [20,21]. RhAs 3 and RhSb 3 , which correspond to La 0.5 Rh 4 As 12 and La 0.5 Rh 4 Sb 12 , respectively, are semiconductors with E g > 0.85 eV [22] and E g = 0.8 eV [23,24], respectively. Thus, La 0.5 Rh 4 As 12 and La 0.5 Rh 4 Sb 12 not only have similar electrical properties, but also exhibit similar changes in the electrical properties as a result of La filling.…”