J. Phys. France 49, 481-484 (1988)
DOI: 10.1051/jphys:01988004903048100

Low temperature properties of Yb1.2-xEuxMo6S 8 under pressure

J. Beille¹, B. Cheaito¹, M.S. Torikachvili² et M.B. Maple<sup>2

1</sup>  Laboratoire Louis Néel, CNRS, 38042 Grenoble France
²  Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093, U.S.A.

Abstract
The properties of Yb1.2-xEuxMo6S 8 compounds have been investigated by means of electrical resistivity and ac magnetic susceptibility measurements under hydrostatic pressure up to 20 kbar and quasi-hydrostatic pressure up to 100 kbar. A temperature-pressure-Eu concentration phase diagram showing the crystallographic, normal and superconducting phases of these compounds was constructed.

Résumé
Les propriétés des composés pseudoternaires Yb1.2-xEux Mo6S8 ont été étudiées à l'aide des mesures de résistivité électrique et de susceptibility magnétique ac sous pression hydrostatique jusqu'à 20 kbar et quasi hydrostatique jusqu'à 100 kbar. Un diagramme de phase de température-pression-concentration d'Eu montrant les phases cristallographiques, normales et superconductrices de ces composés a été construit.

PACS
6250 - High-pressure and shock wave effects in solids and liquids.
6470 - Specific phase transitions.
7410 - Occurrence, potential candidates.
7470 - Superconducting materials.

Key words
electrical conductivity of crystalline semiconductors and insulators -- europium compounds -- high pressure solid state phase transformations -- magnetic susceptibility -- phase diagrams -- superconducting transition temperature -- type II superconductors -- ytterbium compounds