Dielectric and ferroelectric properties of LaFeO3 particles derived from metal organic frameworks precursor

Abstract

As one of the few single-phase multiferroic materials with both antiferromagnetic and ferroelectric properties, LaFeO3 has attracted much attention, especially film and ceramic. In this work, LaFeO3 particles were prepared by thermal decomposition of Metal Organic Frameworks (MOFs) precursor La[Fe(CN)6]·5H2O, and the dielectric and ferroelectric properties of particles were studied for the first time. The effect of annealing temperature and time on the dielectric and ferroelectric performance were investigated in detail. The results indicate that the LaFeO3 particles annealed at 600 °C for 5 h achieve dielectric constant of 201, remnant polarization 2Pr of 0.064 μC/cm2 with coercive electric field 2Ec of 39.16 kV/cm, higher than those of other annealing time. In addition, the LaFeO3 particles annealed at 700 °C for 3 h exhibit dielectric constant of 178 and remnant polarization 2Pr of 0.072 μC/cm2 which are higher compared with other annealing temperatures. Our results provide useful information to study LaFeO3 particles.