中国物理B ›› 2018, Vol. 27 ›› Issue (12): 127701-127701.doi: 10.1088/1674-1056/27/12/127701

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Effect of an electric field on the electrocaloric response of ferroelectrics

Hongbo Liu(刘宏波)   

  1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • 收稿日期:2018-09-13 修回日期:2018-10-15 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: Hongbo Liu E-mail:bohongliu@gmail.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11704242) and the Natural Science Foundation of Shanghai, China (Grant No. 17ZR1447200).

Effect of an electric field on the electrocaloric response of ferroelectrics

Hongbo Liu(刘宏波)   

  1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2018-09-13 Revised:2018-10-15 Online:2018-12-05 Published:2018-12-05
  • Contact: Hongbo Liu E-mail:bohongliu@gmail.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11704242) and the Natural Science Foundation of Shanghai, China (Grant No. 17ZR1447200).

摘要:

The electrocaloric effect of the model ferroelectric BaTiO3 was investigated using phenomenological theory. The results indicate that the applied electric field strength is a key factor for the induced electrocaloric response and there are two distinguishing electrocaloric responses. When a moderate electric field is applied, the electrocaloric temperature variation is small but the electrocaloric strength is high. In contrast, the electrocaloric temperature variation is large but electrocaloric strength is low when a very high electric field is applied. These results are consistent with the experimental observations on BaTiO3 based bulk and thin film ferroelectric materials.

关键词: BaTiO3, ferroelectrics, electrocaloric effect

Abstract:

The electrocaloric effect of the model ferroelectric BaTiO3 was investigated using phenomenological theory. The results indicate that the applied electric field strength is a key factor for the induced electrocaloric response and there are two distinguishing electrocaloric responses. When a moderate electric field is applied, the electrocaloric temperature variation is small but the electrocaloric strength is high. In contrast, the electrocaloric temperature variation is large but electrocaloric strength is low when a very high electric field is applied. These results are consistent with the experimental observations on BaTiO3 based bulk and thin film ferroelectric materials.

Key words: BaTiO3, ferroelectrics, electrocaloric effect

中图分类号:  (Pyroelectric and electrocaloric effects)

  • 77.70.+a