Abstract
In this work, the effects of magnetic annealing on crystal structure and multiferroic properties of BiFeO3 and Bi0.85Dy0.15FeO3 have been investigated. It is found that the X-ray diffraction patterns of pure BiFeO3 samples are obviously broadened after magnetic annealing, whereas those of Bi0.85Dy0.15FeO3 samples are almost unchanged. Magnetic field annealing did not affect the magnetic properties of these two kinds of samples much. However, ferroelectric properties of the two materials exhibited different behaviors after magnetic field annealing. For pure BiFeO3 samples, the remnant polarizations (Pr) are suppressed; in contrast, for Bi0.85Dy0.15FeO3 samples, Pr is greatly enhanced. Possible mechanisms for the effects of magnetic field annealing have been discussed.
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