PHYSICS/BK21 SEMINAR[10.02.04]

Electric field-induced magnetocrystalline anisotropy in ferromagnetic transition-metal thin films


연사: prof. Kohji Nakamura[Mie University]

장소: Physics Seminar Room (Science Bldg, 3-201)
일시: 2010 년 2 월 4일 (15:00-1600)


ABSTRACT:

Controlling and designing magnetic properties by an external electric field is a key challenge in modern magnetic physics. Recent experiments interestingly demonstrated that even in itinerant thin film ferromagnets, the magnetocrystalline anisotropy (MCA) is modified by application of a voltage.[1] Here, from first principles by using the precise full-potential linearized augmented plane-wave (FLAPW) method, the effects of an electric field on the MCA in transition-metal thin films are determined. We find that the MCA modification in a free-standing Fe(001) monolayer is induced by a change in the d-band structures at the Fermi level when an electric field is introduced, but no change in the Co(001) and Ni(001) monolayers.[2] A reasonable origin from a band filling analysis is obtained. Results for thin films Fe on MgO substrate are also presented.

문의처: 민병일(054-279-2074, bimin@postech.ac.kr)