热电性
极化(电化学)
铁电性
材料科学
电场
电热效应
薄膜
光电子学
凝聚态物理
电介质
纳米技术
化学
物理
量子力学
物理化学
作者
J. W. Adkins,Ignasi Fina,F. Sánchez,Saidur Rahman Bakaul,Jeremiah T. Abiade
摘要
Herein, we examine the influence of controllable polarization reversal and built-in electric fields on pyroelectric and electrocaloric effects in a BaTiO3 thin film using a modified indirect method. We find that the magnitude of the sample's change in polarization with temperature is sensitive to the degree of polarization reversal. The pyroelectric response is small at low fractions of switched polarization and grows larger by several factors as larger fractions of polarization are reversed. This polarization reversal-sensitive pyroelectric behavior is the result of an internal built-in field, which has the effect of destabilizing low fractions of switched polarization and producing diminished pyroelectric effect. Greater fractions of switched polarization are more stable against backswitching and permit a larger pyroelectric response. Our findings highlight a characterization method for polarization-dependent pyroelectric effects in ferroelectric thin films, where built-in field effects are also present.
科研通智能强力驱动
Strongly Powered by AbleSci AI