December 1 - 6, 2024
Boston, Massachusetts
Symposium Supporters
2024 MRS Fall Meeting & Exhibit
EN04.06.04

Electric-Field-Induced Thermal Switching in a Bulk Ferroelectric Material at Room Temperature

When and Where

Dec 4, 2024
9:30am - 9:45am
Hynes, Level 1, Room 108

Presenter(s)

Co-Author(s)

Fanghao Zhang1,Shantal Adajian1,Bolin Liao1

University of California, Santa Barbara1

Abstract

Fanghao Zhang1,Shantal Adajian1,Bolin Liao1

University of California, Santa Barbara1
Electric-field-induced thermal switching has recently garnered increasing attention for thermal management, particularly in antiferroelectric and ferroelectric materials. Previous studies have focused on PbZrO3 thin films and PMN-PT solid solutions to achieve thermal switching. However, the small thermal resistance of thin films limits their practical applications, and the inevitable extrinsic phonon scattering in solid solutions complicates their mechanisms, hindering the understanding of how intrinsic ferroelectric polarization and strain affect thermal transport. In this study, we demonstrate significant thermal switching in a bulk single-crystal ferroelectric material at room temperature. We found that, strain, rather than domain walls, plays the most important role in the change in thermal conductivity in bulk ferroelectrics. By engineering the domain switching mechanism, we successfully achieved reversible thermal switching effect with a high switching ratio driven by an external electric field. This result suggests that ferroelectric materials with strong electrostriction can serve as electric-field-induced thermal switches and domain swithcing engineering can be utilized as an efficient way to achieve reversible thermal switching in ferroelectrics. This work is based on research supported by the U.S. Office of Naval Research under the award number N00014-22-1-2262.

Keywords

thermal conductivity

Symposium Organizers

Shuo Chen, University of Houston
Qing Hao, University of Arizona
Sunmi Shin, National University of Singapore
Mona Zebarjadi, University of Virginia

Symposium Support

Bronze
Nextron Corporation

Session Chairs

Qing Hao
Mary Anne White

In this Session