程振祥教授学术报告会

 

报告题目：Multiferroics, material and application

报 告 人：程振祥教授（澳大利亚卧龙岗大学）

时 间：2015年9月28日（周一）上午10：30

地 点：磬苑校区理工E楼E400

主办单位：物理与材料科学学院

 

报告人简介

 

     Z. X. Cheng received B.S. in Physics in 1995, a M.S. in solid state physics in 1998 and a PhD in material science in 2001, from the Department of Physics and the State Key Lab. of Crystal Materials, Shandong University. He accepted a research fellow position at the Institute for Superconducting and Electronic Materials (ISEM) of University of Wollongong in 2002. He is a JSPS (Japanese Society for Promotion of Science) fellow at National Institute for Material Science (NIMS) in Japan during 2003-2005. At the end of 2005, he returned to ISEM as a research Fellow. Due to his outstanding performance he was awarded the highly prestigious Future Fellowship from the Australia Research Council in 2009, and promoted to an Associate Professor in 2010.

      Cheng has published more than 200 SCI journal papers in the field of applied physics with more than 2300 citations. More than 50 papers appear on the prestigious journals, like Physical Review Letters (PRL), Nano Letters, J. American Chemical Society, Angewandte Chemie, Advanced Healthcare Materials, Phys. Rev. B (PRB), Applied Physics Letters (APL), Chemistry Communication and Scientific Reports. He has more than 30 invited talks on international conferences, workshops and universities.

His research currently is mainly in the field of ferroic materials and physics, and their applications in various fields, like energy storage:

1. Electronic polar materials and their applications, including dielectric materials, ferroelectric materials/piezoelectric materials, the relationship linking their crystal structure, microstructure(dislocation and domain) and their dielectric relaxation and polarization, and their applications as RAM, sensor and actuators.

2. Magnetic materials and their applications, including diluted magnetic semiconductors, ferromagnetic materials/antiferromagnetic, super paramagnetic materials and exotic magnetic behaviours (glass, ice and liquid), their magnetization behaviour and magnetic structure. Applications like in magnetocaloric refrigeration and spintronics.

3. Multiferroic materials and the magnetoelectric coupling behaviour and mechanism, applications as sensor.

4. Spin and electron dynamics in magnetic magnetic and multiferroic materials at specific magnetic ordering status, using Thz and ultrafast laser spectroscopy.

5. The first principle calculation of the magnetic and electronic materials, to link their electronic band structure to their physical property (conductivity and magnetic ordering).

6.  Thermoelectric materials for energy conversion

7.  Novel low dimension materials for spintronics and electrochemical applications.

 

报告摘要：

Multiferroic material is a class of materials containing more than one ferroic order. Ferroelectric magnetic multiferroic materials contain simultaneous polarization and magnetization. The separated ferroic orders and the coupling between them make the multiferroic material the great potential for application in memory devices and sensors. BiFeO₃, as a multiferroic material with simultaneous ferroelectricity and magnetism above room, has attracted great attention in the past years. I will talk about our work on BiFeO₃ and its potential application as memory device in a junction structure and our recently observed bias exchange in multiferroic heterostructures. Our work on the exploration of new multiferroic system and spin frustrated magnetic system will also be introduced in my talk.