Eur. Phys. J. Special Topics 153, 103-106 (2008)
https://doi.org/10.1140/epjst/e2008-00403-y

Lanthanum Deficiency effects on the electrical and thermal properties of La_0.7-x□_xCa_0.3MnO₃ Perovskite Manganite

¹ Photothermal Laboratory, I PEIN, 8000 Nabeul, Tunisia
² Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, Tunisia

Corresponding authors: Taher.Ghrib@ipein.rnu.tn taher.ghrib@yahoo.fr

Abstract

Investigation of thermal properties of La_0.7-x□_xCa_0.3MnO₃ according to the density of the Lanthanum Deficiency x using the Photothermal Deflexion Technique (PTD). We show in this work that both the thermal conductivity and thermal diffusivity increases with x. and heat transfer is exclusively assured by phonon. From the thermal diffusivity value, one can obtain an order of magnitude of the inter-atomic distance.