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반쪽 금속 호이슬러 화합물 Mn₃Ga의 연 X선 방사광 분광 연구
성승호(Seungho Seong),이은숙(Eunsook Lee),김현우(Hyun Woo Kim),김대현(D. H. Kim),강정수(J.-S. Kang),M. Venkatesan,J. M. D. Coey 한국자기학회 2016 韓國磁氣學會誌 Vol.26 No.6
By employing photoemission spectroscopy (PES) and soft X-ray absorption spectroscopy (XAS), the electronic structure of the candidate half-metallic antiferromagnet of Mn₃Ga Heusler compound has been investigated. We have studied two ball-milled Mn₃Ga powder samples, one after annealing and the other without annealing, respectively. Based on the Mn 2p XAS study, we have found that Mn ions are nearly divalent in Mn₃Ga and that the Mn ions having the locally octahedral symmetry and those having the locally tetrahedral symmetry are both present in Mn₃Ga. We have found relatively good agreement between the measured valence-band PES spectrum of Mn₃Ga and the calculated density of states, which is in agreement with the half-metallic electronic structure of Mn₃Ga.