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Journal ArticleDOI

AB compounds with ScY and rare earth metals. II. FeB and CrB structures of monosilicides and germanides

01 Apr 1966-Acta Crystallographica (International Union of Crystallography)-Vol. 20, Iss: 4, pp 572-582
About: This article is published in Acta Crystallographica.The article was published on 1966-04-01 and is currently open access. It has received 157 citations till now.
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TL;DR: In this article, the state diagrams of the binary systems R-Ga where R = Se, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are proposed.
Abstract: From the results obtained by differential thermal analysis and X-ray diffraction, the state diagrams of the binary systems R-Ga where R = Se, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are proposed. The liquidus line near Ga has been determined using the solubility data of R in liquid gallium. The previously unknown compounds Sc5Ga4, ScGa2, ScGa3, EuGa, DyGa3, Er2Ga3, Tm2Ga3, TmGa2, YbGa, Lu2Ga3 and LuGa2 are found. ScGa3 crystallizes in a cubic structure of the AuCu3 type. A short discussion of the change in the thermal stability of the intermediate phase and its dependence on the order number of the component R is given.

133 citations

Journal ArticleDOI
TL;DR: A marker study of the silicides of rare earth elements obtained from metallic thin films on Si and Ge substrates indicates that Si(and Ge) atoms constitute the dominant diffusing species during the formation of these two types of compounds as mentioned in this paper.
Abstract: A marker study of the silicides (and germanides) of rare‐earth elements obtained from metallic thin films on Si (and Ge) substrates indicates that Si(and Ge) atoms constitute the dominant diffusing species during the formation of these two types of compounds. Rutherford backscattering is used to distinguish between pairs of elements having different atomic weights but very similar with respect to their chemical and metallurgical behavior. An experiment conducted with the diffusion bilayer sample Ge‐Tb on Si confirms the results obtained with bilayers of the type Y‐Tb on Si (or Ge). Examination of the structure of the silicides which are formed provides clues about the difference in mobility between the Si and the metal atoms.

129 citations

Journal ArticleDOI
TL;DR: In this paper, a detailed review of all the rare earth intermetallics with a significant magnetic moment on the B partner is presented, and the properties of the R-3d intermetals are discussed.

124 citations

Journal ArticleDOI
TL;DR: The crystal structures of the intermetallic compounds in the trivalent lanthanide-gold systems were investigated using both powder-and single-crystal X-ray diffraction methods as mentioned in this paper.
Abstract: The crystal structures of the intermetallic compounds in the trivalent lanthanide-gold systems were investigated using both powder- and single-crystal X-ray diffraction methods. Some of these alloys were studied by differential thermal analysis and metallographic evidence was used to confirm the stoichiometries. In the twelve R-Au systems ( R = La , Ce , Pr , Nd , Sm , Gd , Tb , Dy , Ho , Er , Tm and Lu ), compounds exist at seven stoichiometries which involve twelve structure types and eighty phases. The R 2 Au phases represent the only complete isomorphic series. Depending upon R, the RAu (1:1) compounds exhibit two or three polymorphic forms. Three different structures occur as R is varied along the lanthanide series in the RAu 2 phases. For R = Gd - Lu , the RAu 3 compounds form and RAu 3.6 compounds exist for all the rare earths except Er, Tm and Lu. RAu 4 phases exist only for R = Ho , Er , Tm and Lu . A structure change occurs in the RAu 6 series between Nd and Sm and this phase does not form in the case of R = Er , Tm and Lu . The crystallographic data for these compounds are presented and their structural relationships are discussed. The melting and transformation temperatures of some of the RAu (1:1) compounds have been determined. The melting points increase in a smooth fashion as a function of atomic number from 1325 ° C for LaAu to 1780 ° C for LuAu.

116 citations

Journal ArticleDOI
TL;DR: In this paper, the physicochemical properties of thin layers of rare earth metals and rare earth silicides on Si substrate surfaces are reviewed, including the formation of reactive interfaces at room temperature and the evolution of ordered surface structures at elevated temperature.
Abstract: The physiochemical properties of thin layers of rare earth metals and rare earth silicides on Si substrate surfaces are reviewed. The topics discussed include the formation of reactive interfaces at room temperature, the evolution of ordered surface structures at elevated temperature and the oxidation of rare earth interfaces and silicides. Special emphasis is placed on the discussion of the geometrical and electronic structure of ordered overlayer phases.

86 citations