Electrical control of exchange bias mediated by graphene.
The role of graphene in mediating the exchange interaction is theoretically investigated when placed between two ferromagnetic dielectric materials. The calculation based on a tight-binding model illustrates that the magnetic interactions at the interfaces affect not only the graphene band structure but also the thermodynamic potential of the system, leading to an effective exchange bias between magnetic layers. The analysis indicates a strong dependence of the exchange bias on the properties of the mediating layer, revealing an efficient mechanism of electrical control even at room temperature.
Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695-7911, USA.
Y G
YG
Semenov
J M
JM
Zavada
K W
KW
Kim