12166-69-7Relevant articles and documents
Low Temperature Properties of the Magnetic Semiconductor TmTe
Matsumura, Takeshi,Nakamura, Shintaro,Goto, Terutaka,Amitsuka, Hiroshi,Matsuhira, Kazuyuki,Sakakibara, Toshiro,Suzuki, Takashi
, p. 612 - 621 (1998)
The magnetic susceptibility, elastic constant, specific heat and magnetization of the magnetic semiconductor TmTe have been measured in detail. A phase transition which is likely to be an antiferro quadrupolar ordering was found to occur at 1.8 K. The specific heat measurements under magnetic fields along the three main crystal axes revealed the unusual characters of this phase transition. The (H - T) phase diagram below 5 T is very similar to that of the antiferro quadrupolar ordering in CeB6. Above 5 T, however, the phase line for H ∥ [100] begins to close toward T = 0 K. The physical properties in the paramagnetic region at high temperatures are discussed in the mean field approximation. The theoretical fitting of the elastic softening indicates the antiferro inter-ionic quadrupolar interactions. However, the mean field theory can not explain the specific heat results.
Chalcogen-rich lanthanide clusters: Compounds with Te2-, (TeTe)2-, TePh, TeTePh, (TeTeTe(Ph)TeTe)5-, and [(TeTe)4TePh]9- ligands; single source precursors to solid-state lanthanide tellurides
Freedman, Deborah,Emge, Thomas J.,Brennan, John G.
, p. 492 - 500 (2002)
Lanthanide metals react with PhTeTePh and elemental Te in pyridine to give (py)yLn4(Te)(TeTe)2(TeTeTe(Ph)-TeTe)(Te xTePh) (Ln = Sm (y = 9; x = 0); Tb, Ho (y = 8, x = 0.1)), and (py)7Tm4(Te)[(TeTe)4TePh](Te0.6 TePh) clusters. The Sm, Tb, and Ho compounds contain a square array of Ln(III) ions all connected to a central Te2- ligand. Two adjacent edges of the square are bridged by ditelluride ligands, with the Ln ion that is η2 bound to both of these TeTe ligands also coordinating to a terminal TePh ligand. The other two edges of the square are spanned by ditellurides that both coordinate a TePh ligand that has been displaced from the Ln ion by pyridine, to give the pentaanion (μ-η2-η2-Te2Te(Ph)Te2 ).5- In the Tm compound, the displaced TePh interacts with all four TeTe units. The compounds are air-, light-, and temperature-sensitive. Upon thermolysis, they decompose to give solid-state TbTe2-x, HoTe, or TmTe, with elimination of Te and TePh2.
Stabilization of type-I antiferromagnetism in mixed-valence TmTe at P = 6 GPa
Mignot,Goncharenko,Matsumura,Suzuki
, p. 211 - 213 (2001)
Previous investigations of magnetic order in the pressure-induced mixed-valence state of TmTe have been extended to a maximum pressure of P = 6.0 GPa. At this pressure, the same type-I antiferromagnetic state as in TmSe at P = 0 is formed below TN = 2.55K, with a comparable magnetic moment of μ = 1.9 ± 0.2 μB. The fact that this value is about 50% larger than at 5.4 GPa in the ferromagnetic phase suggests that the change in the magnetic structure is associated with an instability of the Tm 4f moment.
Reduced ternary rare-earth-transition metal tellurides for the smaller rare-earth elements. An exploration and an explanation of the marked stability differentiation among the rare-earth elements in these phases
Herzmann, Nina,Gupta, Shalabh,Corbett, John D.
, p. 848 - 854 (2009/10/09)
The existence of further metal-rich condensed cluster compounds in R-Z-Te systems has been synthetically explored for R = Sc, Y, Pr, Dy, Er, Tm, Yb, Lu and, mainly, Z = Ru, Rh, Pd, Ag, Ir, Pt, Au. Ten new examples of orthorhombic Er7Ni2/s
Synthesis growth and investigation of the physical-chemical properties of single crystals of TmSb, TmTe and their solid solutions TmSb1-xTex
Abdusalyamova, M. N.,Chuiko, A. G.,Golubkov, A. Y.,Popov, S. I.,Parfenova, L. S.,et al.
, p. 107 - 110 (2008/10/08)
A complete series of TmSb1-xTex single crystals has been prepared in order to enable a systematic investigation of the valence change of Tm between nearly +3 for semimetallic TmSb and +2 for semiconducting TmTe. A discontinous semiconductor-metal transition is observed at x=0.8-0.9.
Thermodynamics of sublimation and crystal chemistry of Tm0.77Te
Petzel, T.,Ludwigs, J.,Greis, O.
, p. 317 - 328 (2008/10/08)
The congruent vaporization of solid Tm0.77Te (rhombohedral, with hexagonal lattice parameters a = 430.9 pm, c = 1083.8 pm) was investigated by the Knudsen effusion weight-loss technique over the temperature range 1624 - 1798 K. Using literature data for the enthalpies of dissociation of gaseous TmTe and Te2 and for the free energy functions of gaseous TmTe, Te2, thulium and tellurium, an equation for vaporization to the atoms is given. A vapor pressure equation is provided. Second and third law calculations based on estimated thermodynamic data for Tm0.77Te yielded the standard enthalpies and entropies of reaction. The crystal chemistry and thermochemical properties are discussed.
