The stability of the ferrite morphology under a high magnetic field has been investigated according to the combination of the extended Weiss molecular field theory and the principle of minimum energy. The results showed that the ferromagnetic phase region decreases significantly with the increase of total angular momentum, whereas the paramagnetic phase region has the opposite tendency. The magnetic-field-induced morphology is noted to be closely related to the angular momentum, magnetic moment and interfacial energy. Based on the principle of minimum energy, the magnetic-field-induced aspect ratio (2.48:1) of the ferrite grains is in good agreement with the previous experimental data.

中文翻译：

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铁氧体强磁场诱导形貌的热力学机制

根据扩展的Weiss分子场理论和最小能量原理，研究了强磁场下铁氧体形貌的稳定性。结果表明，随着总角动量的增加，铁磁相区显着减小，而顺磁相区则有相反的趋势。注意到磁场诱导的形态与角动量、磁矩和界面能密切相关。根据最小能量原理，铁素体晶粒的磁场诱导纵横比（2.48:1）与之前的实验数据吻合良好。