Developing Na_0.5Bi_0.5TiO₃-based magnetoelectric (ME) coupling composites with higher depolarization temperature is highly valuable for the environment-friendly smart electronic devices. We have developed a new kind of 0-3 type 0.94Na_0.5Bi_0.5TiO₃-0.06BaTiO₃:xCoFe₂O₄ (NBTBT:xCFO, x = 0, 0.1, 0.2, 0.3) composite ceramics with a deferred depolarization temperature, together with an additional strong ME coupling of 9.2 mV/cm·Oe for the NBTBT:0.2CFO. The basic structure, ferroelectric/ferromagnetic properties, and the depolarization temperature of the NBTBT:xCFO composite ceramics were investigated. It was found that an enhancement of depolarization temperature (>25 °C) was obtained in these 0-3 type composites relative to the pure NBTBT ones (115 °C vs 90 °C). The mechanism of the enhanced depolarization temperature of the composites is discussed. The present results demonstrate that NBTBT:xCFO composites have great potential for ME devices.

开发具有更高去极化温度的Na _0.5 Bi _0.5 TiO ₃基磁电（ME）耦合复合材料对于环保型智能电子设备非常有价值。我们开发了一种新型的0-3型0.94Na _0.5 Bi _0.5 TiO ₃ -0.06BaTiO ₃：x CoFe ₂ O ₄（NBTBT：x CFO，x = 0、0.1、0.2、0.3）复合陶瓷，具有延迟的去极化温度，以及针对NBTBT：0.2CFO的9.2 mV / cm·Oe的附加强ME耦合。研究了NBTBT：x CFO复合陶瓷的基本结构，铁电/铁磁性能以及去极化温度。已发现，相对于纯NBTBT复合材料（115°C vs 90°C），这些0-3型复合材料的去极化温度提高了（> 25 °C）。讨论了复合材料提高去极化温度的机理。目前的结果表明，NBTBT：x CFO复合材料对于ME器件具有巨大的潜力。