Effect of praseodymium doping on the structural and magnetic properties of La _1.2−x Pr _x Sr _1.8 Mn ₂ O ₇ bilayer manganese oxides

Abstract

Structural and magnetic properties of La 1.2-x Pr x Sr 1.8 Mn 2 O 7 (0 ≤ x ≤ 1.2) bilayers manganese oxides have been investigated. Structural characterizations showed that all our synthesized samples crystallize in the tetragonal structure with I4/mmm space group. Magnetization measurements versus temperature showed that all of our samples exhibit a paramagnetic to ferromagnetic transition with decreasing temperature. The Curie temperature T c decreases with increasing praseodymium content. It is found to decrease from 315 K for x = 0 to 265 K for x = 1.2.