Room-temperature I-V characteristics of a single hollow La 2/3Ca1/3MnO3 microparticle

M.E. SALETA; M. GRANADA; J. CURIALE; R. BENAVIDES; H. E. TROIANI; R. D. SANCHEZ

JOURNAL OF PHYSICS CONDENSED MATTER

IOP PUBLISHING LTD

Lugar: Londres; Año: 2011 vol. 23 p. 275301 - 275301

0953-8984

In this work we present an electrical characterization of La 2/3Ca1/3MnO3 particles obtained by spray pyrolysis. We optimized the synthesis conditions to obtain the desired compound with the expected structure and the ferromagnetic transition at the same temperature as the bulk material. We found that a post-deposition thermal treatment enhances the magnetic properties of the samples. The study of structural, morphological and magnetic properties shows that the walls of the hollow spheres are constituted by grains on the nanometer scale. The I-V characterization shows typical signatures of tunneling transport. This behavior can be associated with the grain boundaries within the microparticle's wall acting as tunnel barriers. © 2011 IOP Publishing Ltd.