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Spin Polarization of CuO Nanowires
Jisang Hong 한국자기학회 2006 Journal of Magnetics Vol.11 No.1
??Very recently, it was presented that the one dimensional (1D) CuO atomic chains can maintain large magnetic moments. In this work, we analyzed m-resolved density of states (DOS) to understand the peculiar spin polarization occurred in Cu atoms. It was found that the /m/=1 states play an essential role in the spin polarization of Cu atoms. In addition, we calculated magnetic anisotropy energy (MAE) and observed that the distribution of MAE is strongly sensitive to the interatomic distance between Cu and O atoms. Besides, it was revealed that the contribution to MAE comes for the second half of Brillouin zone (BZ).
Controlling of magnetic phase in delta doped (Ga,Mn)As structures
Jisang Hong 한국자기학회 2005 한국자기학회 학술연구발표회 논문개요집 Vol.15 No.1
With FLAPW calculations, we first theoretically found that one can manipulate the magnetic exchange interaction between two magnetic monolayer in Mn doped GaAs structures. The magnetic phase change was occurred when the interlayer distance is about 16 A. The ferromagnetic interaction was stable if the Mn-Mn distance is less than 16 A although the ferromagnetic phase stability was modified by carrier type. We hope our theoretical results stimulate experimental verification.