Supplementary Material

See the supplementary material for field and temperature dependent leakage current density, temperature dependent change in polarization, adiabatic temperature change measured at different temperatures and fields by IR imaging, FE measurement and EC response measured in 1st and 2nd repeat cycles for BTO single crystal.请查阅补充材料，获取钛酸钡（BTO）单晶的如下测试数据：场强与温度相关的漏电流密度、随温度变化的极化变化量；通过红外成像（IR imaging）、铁电（FE）测试测得的不同温度与场强下的绝热温度变化；以及首次与第二次重复循环条件下获取的电热（EC）响应。