Magnetoelectric (ME) materials have caught worldwide attentions owing to their potential technological applications in ME switching devices or high-density data storage. However, realizing a sufficiently strong ME effect in one single material is always the key issue. Herein, we systematically investigate the Co₃NiNb₂O₉, including the characterization of its crystalline structure, magnetism, specific heat, and pyroelectric properties. It is revealed that Co₃NiNb₂O₉ exhibits a remarkable ME response below the magnetic phase transition temperature of T_N ∼32 K. On one hand, the magnetic field-induced electric polarization is observed below T_N while it is non-ferroelectric at no magnetic field. The evaluated ME coefficient is as large as 21.2 ps/m. On the other hand, the magnetization is significantly modulated by the applied electric field, with the inverse ME coefficient being 14.1 ps/m. The observed ME responses suggest a stable ME mutual control by the magnetic or electric field in Co₃NiNb₂O₉.

磁电（ME）材料由于其在ME交换设备或高密度数据存储中的潜在技术应用而引起了全世界的关注。但是，在一种材料中实现足够强的ME效果始终是关键问题。在本文中，我们系统地研究了Co ₃ NiNb ₂ O ₉，包括其晶体结构，磁性，比热和热电性质的表征。据透露，钴₃ NiNb _2个ö ₉展品下面的磁相转变温度的显着ME响应Ť _Ñ ~32 K.一方面，该磁场引起的电极化如下观察T _N，在无磁场时为非铁电体。评估的ME系数高达21.2 ps / m。另一方面，磁化强度受到施加电场的显着调制，ME逆系数为14.1 ps / m。观察到的ME反应表明，通过Co ₃ NiNb ₂ O _9中的磁场或电场可以稳定地进行ME相互控制。