Neutron and X-Ray Diffraction Studies of a Valence Fluctuating Compound YbInCu4

Autor:	Hajime Asano, Fujio Izumi, Tadamiki Hihara, Toshizo Fujita, Takashi Suzuki, Kenichi Kojima, Yusuke Nakai
Rok vydání:	1990
Předmět:	Phase transition Valence (chemistry) Materials science business.industry Rietveld refinement Neutron diffraction General Physics and Astronomy Crystal structure Crystallography Optics Lattice constant Condensed Matter::Superconductivity X-ray crystallography business Powder diffraction
Zdroj:	Journal of the Physical Society of Japan. 59:792-795
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.59.792
Popis:	The crystal structure of YbInCu 4 has been refined by the Rietveld analysis of TOF neutron powder diffraction data. This compound has a cubic AuBe 5 (C15b, F\bar43m)-type structure with the lattice constant a =7.1575(6) A, and Yb ions are completely ordered at the 4c site. X-ray powder diffraction data have also been taken as a function of temperature. The lattice constant shows an abrupt change of 0.15% at the temperature of Yb valence phase transition (about 40 K) without any change in the crystal symmetry.
Databáze:	OpenAIRE
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