STRUCTURAL AND MAGNETIC STUDY

OF PEROVSKITE MANGANITES OXIDES Pr1-x xMnO3

W. Boujelben1*, A. Cheikh-Rouhou1, J. C. Joubert2, J, Pierre3

1 Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax,

B. P. 802, 3018 Sfax -Tunisie

2 Laboratoire de Matériaux et du Génie Physique ENSPG, B. P. 46,

38402 Saint Martin d’Hères Cedex, France

3Laboratoire Loui Neel, d’Hères Cedex, France.

* Corresponding author. E-mail : wahiba.boujelben@fss.rnu.tn

Received 20 November 2000; revised version accepted 01 April 2001

Abstract

Structural and magnetic properties in a self doped Pr1-x? xMnO3 system are investigated. X-ray diffraction patterns show that samples with composition range 0.0-0.3 crystallize in orthorhombic perovskite structure with Pbnm space group. Our samples exhibit an antiferromagnetic behavior at low temperature. The temperature ordering as a function of the vacancy content remains constant, however the magnetization magnitude at low temperature (T = 10 K) increases with increasing deficiency content.

Keywords : Ferromagnetism; Manganites; Lacunar; Perovskite.

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