New ferromagnetic semiconductor double perovskites: La2FeMO6 (M = Co, Rh, and Ir)

Huei Ru Fuh, Ke Chuan Weng, Yun Ping Liu, Yin Kuo Wang*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)

摘要

Density functional theory with generalized gradient approximation (GGA) plus onsite Coulomb interaction (GGA + U) was used to calculate physical proprieties of new ferromagnetic semiconductor materials of the La2FeMO6 (M = Co, Rh, and Ir). We calculate the 406 (C229) La2MM′O6 compounds which MM′ can be any pair taken from the 29 transition metal elements except La. La2FeCoO6 is a potential candidate for ferromagnetic semiconductor. For the GGA + U scheme, La2FeCo6 remains a stable FM semiconductor, whereas La2FeRhO6 and La2FeIrO6 are shown the FM and AFM states of which are degenerate with each other. The FM semiconductor gap remains in existence under tensile or compressive strain in La2FeRhO6 and La2FeIrO6. The superexchange interaction in ferromagnetic La2FeMO6 (M = Co, Rh, and Ir) is high spin (HS) Fe completely empty eg orbital hopping to the half-filled (LS) Co (Rh and Ir) empty eg orbital.

原文英語
頁(從 - 到)657-661
頁數5
期刊Journal of Alloys and Compounds
622
DOIs
出版狀態已發佈 - 2015 2月 15

ASJC Scopus subject areas

  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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