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New synthesis route to and physical properties of lanthanum monoiodide.
Ryazanov, Mikhail; Kienle, Lorenz; Simon, Arndt; Mattausch, Hansjürgen.
Afiliação
  • Ryazanov M; Max-Planck Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
Inorg Chem ; 45(5): 2068-74, 2006 Mar 06.
Article em En | MEDLINE | ID: mdl-16499368
A fast procedure to produce LaI by reduction of LaI2 or LaI3 in a Na melt under argon at 550 degrees C is given. The structural studies performed by means of powder X-ray diffraction as well as transmission electron microscopy are consistent with previous single-crystal results. Measurements of the electrical resistance on polycrystalline samples reveal metallic behavior for LaI in the range 10-300 K. Upon cooling, a small maximum in the resistivity has been observed at 67 K. This anomaly disappears upon heating a sample, however, yielding a hysteresis in rho(T) above 70 K. From the Pauli susceptibility, an electron density of states at the Fermi level of about 0.3 eV(-1).formula unit(-1) has been estimated, as compared with a value of 1.0 eV(-1).formula unit(-1) derived from ab initio LMTO band structure calculations.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2006 Tipo de documento: Article
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2006 Tipo de documento: Article