Theoretical studies on the influence of oxygen impurity upon magnetic properties of (Ga,Cr)N

Tatsuya Nakano, Masafumi Shirai, Yoshio Miura, Kazutaka Nagao

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have studied the influence of O impurities upon magnetic properties of (Ga,Cr)N by using first-principles calculations based on the density-functional theory. Although the magnetic moment per Cr atom is enhanced, the ferromagnetic exchange interaction between Cr spins is reduced by co-doping with O into (Ga,Cr)N. In particular, the reduction is remarkable when the doped O atom forms a Cr-O-Cr complex. The role of O impurity is similar to that of N vacancy (VN), however, the O impurities could degrade the ferromagnetic stability of (Ga,Cr)N more seriously than the N vacancies since the formation energy of the Cr-O-Cr complex is much lower than that of the Cr-VN-Cr complex.

本文言語English
ページ(範囲)2155-2157
ページ数3
ジャーナルJournal of Magnetism and Magnetic Materials
310
2 SUPPL. PART 3
DOI
出版ステータスPublished - 2007 3

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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