完全スピン偏極強磁性体の物質設計と合成

概要

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A new class of half-metallic ferromagnets was found in the zinc-blende crystal structure. Zinc-blende ferromagnets, VAs, CrAs, and MnAs, were designed by using ab initio calculations based on local spin-density approximation, which predicts the highly spinpolarized electronic band structure. Successful molecular-beam-epitaxy growth of previously nonexistent zinc-blende CrAs thin films on GaAs (001) substrates was achieved. The photoemission spectra of the CrAs films are explained well by the theoretically predicted electronic band structure. The CrAs films show ferromagnetic behavior at room temperature. The experimentally determined magnetic moment per CrAs unit also agrees well with the theoretical prediction. Preliminary results of the nanocluster formation of zinc-blende MnAs are briefly described.
社団法人日本磁気学会の論文
2002-04-07