Physical properties of SmS in its homogeneity range

Abstract

The electrical and thermal properties of SmS in its homogeneity range are investigated within a wide temperature interval. In the range of the existence of the compound the properties are shown to vary from semiconducting to semimetallic ones.

DEGREE OF VALENCE MIXING IN THE METALLIC PHASE OF SmS AND IN TmSe

“…Chemical analysis yields stoichiometry with a precision of + 0.5 % and a comparison of the room temperature electrical conductivity (37 R-' cm-l) with systematic investigations of the el. conductivity as function of chemical composition [14] confirms the good quality of the samples used. The first experiment we have performed on such a black crystal with a 'golden surface, was a X-ray Bragg reflection.…”

Phase equilibria in Cu2Te–In2Te3–{Sb/Bi}2Te3 systems and crystal structure of CuIn5Te8 compound

“…The phase diagram of the system Cu 2 Te-Sb 2 Te 3 to our knowledge has not been reported. Zhuze et al [11] reported that in this system the solubility on Our full-profile Rietveld refinement (final R p = 9.20%, R wp = 11.57%; the atomic, thermal and occupation parameters were fixed) showed, that the diffraction pattern of the alloy with CuSbTe 2 composition contains a mixture of Cu 2 Te (SG P3m 1 a = 0.8347(4) nm, c = 2.1648(8) nm) and Sb 2 Te 3 (SG R3m, a = 0.4260(1) nm, c = 3.0462(5) nm) reflections. The constitution of the Cu 2 Te-Sb 2 Te 3 system was established by means of differential thermal analysis.…”

EPR Study of Crystal Defects in SmS

“…We deduce that the Sm3+ ion is embedded in a square symmetry, generated by a [ l o 01 four-fold axis. The most simple situation we can imagine to explain such a symmetry is the presence of a S2vacancy[6], or a 02substituting a S2ion[7], which makes a neighbouring samarium coming in a 3 + valence state. The fourfold axis would then be the Sm3+-sulfur vacancy or Sm"-02-z-axis.…”