Structural, magnetic and magnetocaloric properties of Pr0.6-xErxSr0.4MnO3 (x=0.0, 0.1 and 0.2)

Rafik M'Nassri (1) , W. Cheikhrouhou-Koubaa (1) , Nassira Boudjada (2) , A. Cheikhrouhou (1)

1 Laboratoire de Physique des Matériaux.Sfax 3000, Tunisia.
2 NEEL - MRS - Matériaux, Rayonnements, Structure

We investigate the effect of Erbium doping on the structural, magnetic and magnetocaloric properties of Pr0.6-xErxSr0.4MnO3 (x = 0.0, 0.1 and 0.2) powder samples. Our polycrystalline samples were synthesized using the solid-state reaction at high temperature. X-ray diffraction characterizations showed that all our studied samples crystallize in the distorted orthorhombic system with Pnma space group. All our synthesized samples exhibit a paramagnetic-ferromagnetic transition with decreasing temperature. The magnetic transition temperature T-C is found to decrease continuously with increasing Er concentration. It was found that the maximum value of the magnetic entropy change for Pr0.4Er0.2Sr0.4MnO3 sample reached vertical bar Delta S-M(max)vertical bar = 2.40 J kg(-1) K-1 in a magnetic applied filed of 2T.

Mots clés: RESISTIVITY; EFFECTIVE IONIC RADII; TRANSITIONS

Domaines: Cristallographie

Rafik M'Nassri, W. Cheikhrouhou-Koubaa, Nassira Boudjada, A. Cheikhrouhou. Structural, magnetic and magnetocaloric properties of Pr0.6-xErxSr0.4MnO3 (x=0.0, 0.1 and 0.2). EPJ Web of Conferences, 2012, 29, pp.00051. ⟨10.1051/epjconf/20122900051⟩. ⟨hal-00986001⟩