Abstract We present a study of multiferroic properties of YFeO3 synthesized by means of high-energy ball milling assisted by annealing at low temperature. Fe2O3 and Y2O3 powders were mixed in a stoichiometric ratio, milled for 5 h, pressed and annealed at temperature from 773 to 1073 K. X-ray diffraction (XRD) analysis confirmed the formation of single-phase orthorhombic structure. Magnetic hysteresis loops, at room temperature, from vibrating sample magnetometry show the transition from ferromagnetic order to G-antiferromagnetic order, related to the transformation from amorphous to crystalline orthorhombic single phase. The value of Neel temperature of single phase YFeO3 was obtained at 595 K, lower than previously reported. Dielectric behavior at room temperature of YFeO3 single-phase sample shows a direct dependence with frequency of both dielectric constant and dielectric loss, in good agreement with Maxwell-Wagner effect. A fit made using Cole-Cole equation shows that the Low Temperature Dielectric Relaxation, LTDR, corresponds to a Debye-type relaxation. Finally, it was found that AC conductivity (σAC) increases linearly with frequency. All results show that YFeO3 synthesized by high-energy ball milling assisted with annealing possess a multiferroic behavior.

中文翻译：

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钙钛矿YFeO 3 的晶体结构和多铁性行为

摘要 我们研究了通过低温退火辅助高能球磨合成的 YFeO3 的多铁性。Fe2O3 和 Y2O3 粉末按化学计量比混合，研磨 5 小时，在 773 至 1073 K 的温度下压制和退火。 X 射线衍射 (XRD) 分析证实了单相正交结构的形成。在室温下，来自振动样品磁力计的磁滞回线显示了从铁磁有序到 G-反铁磁有序的转变，这与从非晶态到晶体正交单相的转变有关。单相 YFeO3 的尼尔温度值在 595 K 下获得，低于先前报道的值。YFeO3 单相样品在室温下的介电行为显示出与介电常数和介电损耗的频率直接相关，与 Maxwell-Wagner 效应非常吻合。使用 Cole-Cole 方程进行的拟合表明低温介电弛豫 LTDR 对应于德拜型弛豫。最后，发现交流电导率 (σAC) 随频率线性增加。所有结果表明，通过高能球磨辅助退火合成的 YFeO3 具有多铁性行为。