A multiferroic ceramic with perovskite structure: (La0.5Bi0.5)(Mn0.5Fe0.5)O3.09

Asish Kundu (1) , R. Ranjith (1) , B. Kundys (1) , N. Nguyen (1) , V Caignaert (1) , Valérie Pralong (1) , Wilfrid Prellier (1) , B. Raveau (1)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

An ABO3 perovskite multiferroic, where the B-site cation is responsible for the magnetic properties and the A-site cation with lone pair electron is responsible for the ferroelectric properties, was synthesized with the composition (La0.5Bi0.5)(Mn0.5Fe0.5)O3.09 at normal conditions. This oxide exhibits a ferromagnetic transition around 240 K with a well defined hysteresis loop, and a significant reversible remnant polarization below 67 K similar to ferroelectric behavior. The magnetic interaction is interpreted by the ferromagnetic Fe3+–O–Mn3+ and antiferromagnetic Fe3+(Mn3+)–O–Fe3+(Mn3+) interactions competed with each other, whereas the ferroelectricity is predominantly due to the polar nature introduced by the 6 s2 lone pair of Bi3+ cations. We gratefully acknowledge the CNRS, the French Ministry of Education and Research, and the European project MaCoMuFi (No. NMP3-CT-2006-033221), for financial support.

Domaines: Physique [physics]; Chimie; Matériaux

Asish Kundu, R. Ranjith, B. Kundys, N. Nguyen, V Caignaert, et al.. A multiferroic ceramic with perovskite structure: (La0.5Bi0.5)(Mn0.5Fe0.5)O3.09. Applied Physics Letters, 2008, 93 (5), pp.052906. ⟨10.1063/1.2961022⟩. ⟨hal-03545125⟩