Condensed-Matter Physics & Materials Science Seminar

"New routes to the electric-field control of magnetism"

Presented by Chun-Gang Duan, Key Laboratory of Polar Materials and Devices, East China Normal University, Shanghai, China

Thursday, June 28, 2012, 1:30 pm — Small Seminar Room, Bldg. 510

In this talk I will report our recent progresses in the first-principles studies on the new routes to the electric-field control of magnetism. We demonstrate that electric-field can be used directly or indirectly to change the magnetic properties of the material, through surface or interface magnetoelectric effect [1,2]. In addition, by replacing normal insulating layer with ferroelectrics in magnetic tunnel junctions (e.g., SrRuO3/BaTiO3/SrRuO3), we could design multiferroic tunnel junctions which combine the advantages of magnetic and ferroelectric tunnel junctions [3]. Furthermore, electric-field can also be used to control the magnetic orderings of multiferroic materials [4]. We also find that ferroelectricity can be induced by short-range magnetic exchange interaction, contrary to previous thoughts that magnetism and ferroelectricity tend to be mutually exclusive and interact weakly with each other when they coexist [5]. These results reveal exciting prospects of multiferroics and magnetoelectric materials for realistic application in multifunctional and low energy-cost electronic devices.

Hosted by: W. Yin

8247  |  INT/EXT  |  Events Calendar

 

Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.