Effect of Fe doping on properties of Pr_0.67Ba_0.33Mn_1-xFe_xO₃perovskites

Abstract

Abstract. Changes in the physical properties of ceramic Pr 0.67 Ba 0.33 Mn 1-x Fe x O 3 (0 ≤ x ≤ 0.15) are interpreted as resulting from the suppression of the ferromagnetic double exchange interaction with almost no lattice effect due to similar ionic radii value of Fe 3+ and Mn 3+ Magnetization and transport measurements show at low temperature ferromagnetic and metallic behavior for x=0 and 0.05 samples, whereas x = 0.10 and x = 0.15 compounds show spin glass like and semiconducting behavior. At high temperature semiconductor and paramagnetic behavior are observed for all the samples.

Influence of polarization and iron content on the transport properties of praseodymium–barium manganite

“…The powders are pelleted at a pressure of 105 N cm À 2 .The samples are finally annealed at 1453 K for 24 h in air. In previous works [28,29], powder X-ray diffraction and powder neutron diffusion are used to investigate the structure and the morphology of the compound. They have shown that the structural parameters and the grain sizes are not affected by Fe doping.…”

“…On the other hand, the composition x¼ 0.1 represents the limit value of Fe concentration which destroys the metallic-insulator transition. Few works and less discussions have been done on the electrical properties of PrBaMnO 3 [27] and Fe doped PrBaMnO 3 [28,29]. In this work, we introduced iron in Pr 0.67 Ba 0.33 MnO 3 and we study its effect on the electrical properties of this compound.…”