The (Fe,Nb )Nb2Se10 family : resistivity and magnetic measurements

2014 The physical properties (electric and magnetic) of (FeNb)Nb2Se10, (Fe, V, Nb)Nb2Se10, (Cr, Nb) Nb2Se10 and (Fe, Ta, Nb) (Nb, Ta)Se10 are reported and a discussion is given in relation to their structural type. These four compounds exhibit two types of chains within the unit cell, running in a direction parallel to the monoclinic b axis (FeNb3Se10 structural type) : a trigonal prismatic chain (NbSe3 like) where C.D.W.’s occurs at low temperature (as example FeNb3Se10), and an octahedral chain along which the disorder of the distribution of metallic atoms seems to be a key factor governing the transport properties; indeed, it creates a random potential causing the localization of the conduction electrons. J. Physique 45 (11984)771-778 AVRIL 1984, Classification Physics Abstracts . 72.15E 71.30 75.20E