Metal-insulator transition in oxygen-deficient LaNiO3-x perovskites

R. D. SANCHEZ; M.T. CAUSA; A. CANEIRO; A. BUTERA; M. VALLET-REGI; M.J. SAYAGUES; J. GONZALEZ-CALBET; F. GARCÍA-SANZ; J. RIVAS

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

APS

Lugar: NY; Año: 1996 vol. 54 p. 16574 - 16578

0163-1829

In this work we present a study of the magnetic and transport properties of the system LaNiO3-x ~0<x<0.5 where the x=0 member is a well-known metallic oxide. We found that the x=0.5 compound is an antiferromagnetic insulator at room temperature. The metal-insulator transition is observed for an x value around x>0.25. The role played by the sample inhomogeneities on the occurrence of this transition is discussed.