Recently, Prof. Zhao Shifeng with the School of Physical Science and Technology(SPST) of IMU has guided his PhD and master students to make progress in the research of the regulation of domain dynamics in ergodic relaxor ferroelectrics. The results concerned have been published in the top journal in the field of metal materials--Acta Materialia which was launched in 1996 to seek the academic articles that are potentially influential or can substantively advance the development of the field. Acta Materialia is a top academic journal highly recognized in the field of materials science and by those who study the metal materials. It is prestigious in the field of metal materials. The journal is categorized as the top journal in the first section of SCI journals.
Fig. 1 The first page of the article
Due to such intrinsic advantages as ultra-high power density and excellent reliability, the dielectric energy storage technology which is based on the dielectric capacitor, is playing a more and more important role in advanced electronic devices and electric system and has become an irreplaceable part in such particular applications as microwave communication and electric vehicles. As a result, how to design and develop the next-generation dielectric capacitors which has both high power density and energy conversion efficiency has been a research focus in dielectric physics.
Fig. 2 Dynamic evolution of ergodic nanodomains during polarization and depolarization
Through constructing loosely correlated microscopic ergodic nanodomains with strong relaxation dynamics, the research regulated a macroscopic field-induced reversible interconversion between apolar relaxor phases and polar ferroelectric phases, which breaks through the theory that high dielectric polarization and weak ferroelectric hysteresis cannot be obtained and provides a new path to make a breakthrough for dielectric energy storage technology.
Fig. 3 The calculation results of Landau free energy landscape of ferroelectric film
Prof. Zhao Shifeng’s research team
Li Yang, PhD student who was admitted to IMU in 2021 and Lin Wei, master student who was admitted to IMU in 2020 , are the first authors. Prof. Zhao Shifeng is the corresponding author of the article. IMU is the only institution that the authors of the article are with. The research is supported by the National Natural Science Foundation of China, the Natural Science Foundation of Inner Mongolia and the Development Program for the Innovative Research Teams of Universities in Inner Mongolia.
A brief instruction to the authors:
Li Yang, PhD student who was admitted to IMU in 2021, focuses on the research of the electrocaloric effect of ferroelectric crystal and the properties of its energy storage. He has published 2 articles in such international top journals as Acta Mater. and ACS Appl. Mater, Interfaces as the first author or co-authors. Lin Wei, master student who was admitted to IMU in 2020, concentrates on the study of the domain dynamics of relaxor ferroelectric crystal. He has published 1 article in the international top journal-Acta Mater. as the first author or co-first author.
Zhao Shifeng is a professor and PhD student supervisor with the School of Physical Science and Technology of IMU. He has published over 120 research articles in the international top journals and obtained 15 authorized invention patents. Zhao has taken charge of 6 projects supported by 973 Program and other national funds and 6 key projects and projects for excellent young scientists funded by the Natural Science Foundation of Inner Mongolia. He has won the second prize of the Award for the Natural Sciences of Inner Mongolia Autonomous Region and the 1st Award for Young Innovation Talents of Inner Mongolia Autonomous Region, the Award of Science for the Young. He has been selected as one of the Grassland Talents of Inner Mongolia Autonomous Region, one of the first-level talents of 321 Talent Program of Inner Mongolia Autonomous Region and one of the Scientific and Technological Talents of Universities. Prof. Zhao is also the leader of two research teams. One is an innovative research team of the Grassland Talents of Inner Mongolia Autonomous Region-“Rare Earth Micro-nano Functional Materials and Devices”. The other is an innovative research team of the universities-“Dielectric Material and Solid-State Refrigeration”.
