Multiferroic materials endowed with both dielectric and magnetic orders, are ideal candidates for a wide range of applications. In this work, we reported two phase transitions of MnI2 at 3.45 K and 4 K by systemically measuring the magnetic-field and temperature-dependent magnetization of the MnI2 thin flakes. Furthermore, we observed similar temperature- and field-dependent behaviours for the magnetic susceptibility of MnI2 and electronic capacitance of the Ag/MnI2/Ag devices below 3.5 K. Considering the related theory work, we discussed the relationship between the antiferromagnetic and ferroelectric orders in MnI2. Our work reveals the in-plane magnetic and electric properties of MnI2 materials, which might be helpful for the further investigation and application of MnI2 multiferroics in the future.

中文翻译：

---

MnI ₂单晶的磁电性能

具有介电和磁序的多铁性材料是广泛应用的理想选择。在这项工作中，我们通过系统地测量 MnI2 薄片的磁场和温度相关磁化强度，报告了 MnI2 在 3.45 K 和 4 K 下的两次相变。此外，我们观察到 MnI2 的磁化率和低于 3.5 K 的 Ag/MnI2/Ag 器件的电子电容的类似温度和场相关行为。考虑到相关的理论工作，我们讨论了反铁磁和铁电有序之间的关系MnI2。我们的工作揭示了 MnI2 材料的面内磁和电性能，这可能有助于未来 MnI2 多铁性材料的进一步研究和应用。