Abstract
YFeO3 is one of important magneto optic crystals with perovskite structure. The anisotropy of the crystal leads to different physical and chemical properties of the crystal in different directions. In this work, YFeO3 crystals were grown by hydrothermal method and the effects of different mineralizers on the crystal growth were investigated. The results showed that the mineralizer could affect the growth direction of crystal plane during the hydrothermal crystallization process. YFeO3 crystals with various morphologies were grown by adjusting the concentration of the mineralizer under hydrothermal conditions. The transformations between the crystal planes during crystallization were studied by modeling, and the stabilities of {002} and {110} crystal planes under the action of KOH and NaOH were determined. The effects of urea on YFeO3 crystal planes and NH4+ on {002}, {020} and small crystal planes were investigated. Furthermore, the exposure ratio of YFeO3 crystal plane has great influence on its magnetization and coercive field. Finally, the formation and change mechanism of YFeO3 crystals by the hydrothermal method were proposed, providing evidence for further study of the dependence of the shape of YFeO3 on ferromagnetism.
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