Monday, March 5, 2012, 1:00 pm — Small Seminar Room, Bldg. 510
There is a vast world-wide effort underway to discover new materials where magnetization couples to electric polarization and vice versa. The goal is to create devices with important functionalities, for example to couple the spins in ‘spintronics’ with conventional circuits based on electrical charge, to create new kinds of hybrid magnetic-electric memories that overcome existing Moore’s law limitations, to design very sensitive solid-state magnetic sensors, etc. Thus there is both a scientific challenge to find new magneto-electric coupling mechanisms, and a materials challenge to discover new classes of compounds that can exhibit them. Here we present some of the first examples of magneto-electric coupling in organo-metallics. Organo-metallics are single crystalline solids that contain magnetic transition-metal ions and organic ligands that can be electrically polarizable. The crystal structures can be quite complex, and most importantly, flexible for design. We explore coupling mechanisms based on non-coplanar arrangements of spins that break the necessary symmetries to couple to electric polarization.
Hosted by: Meigan Aronson
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