Fe₂TeO₆ has long been considered as a promising high-temperature magnetoelectric (ME) material, while the magnetoelectricity and magnetic ground state of Fe₂TeO₆ have not been well characterized or understood yet. In the present work, we report the systematical study of magnetism, ferroelectricity, ME effect, first principles calculation, and Monte Carlo simulation of Fe₂TeO₆ single crystals. Fe₂TeO₆ exhibits linear ME effect below T_N ∼ 208 K, and only diagonal ME coefficients appears to be non-zero, which agrees with the magnetic point group 4/m'm'm'. The calculated magnetic ground state agrees with previous neutron diffraction, and the strong intra(inter)-bilayer interactions coincide with the high T_N of Fe₂TeO₆. This work will contribute to the understanding of A₂BO₆ ME family and the exploration of high temperature ME materials.

中文翻译：

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Fe2TeO6 中的高温磁电效应


Fe₂TeO₆ 长期以来一直被认为是一种很有前途的高温磁电 （ME） 材料，而 Fe₂TeO₆ 的磁电和磁基态尚未得到很好的表征或理解。在这项工作中，我们报告了 Fe₂TeO₆ 单晶的磁性、铁电性、ME 效应、第一性原理计算和蒙特卡洛模拟的系统研究。Fe₂TeO₆ 在 T_N ∼ 208 K 以下表现出线性 ME 效应，只有对角线 ME 系数似乎不为零，这与磁点群 4/m'm'm' 一致。计算出的磁性基态与之前的中子衍射一致，并且强的双层内（间）相互作用与 Fe₂TeO₆ 的高 T_N 相吻合。这项工作将有助于理解 A₂BO₆ ME 家族和探索高温 ME 材料。