Low Temperature Magnetic Transition of BiFeO₃ Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering.

ABSTRACT: Low temperature magnetic properties of BiFeO₃ powders sintered by flash and spark plasma sintering were studied. An anomaly observed in the magnetic measurements at 250 K proves the clear existence of a phase transition. This transformation, which becomes less well-defined as the grain sizes are reduced to nanometer scale, was described with regard to a magneto-elastic coupling. Furthermore, the samples exhibited enhanced ferromagnetic properties as compared with those of a pellet prepared by the conventional solid-state technique, with both a higher coercivity field and remnant magnetization, reaching a maximum value of 1.17 kOe and 8.5 10^-3 emu/g, respectively, for the specimen sintered by flash sintering, which possesses the smallest grains. The specimens also show

SUBMITTER: Manchon-Gordon AF 

PROVIDER: S-EPMC9821829 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature