From antiferromagnetic insulator to ferromagnetic metal: Effects of hydrogen substitution in LaMnAsO

Taku Hanna, Satoru Matusishi, Katsuaki Kodama, Toshiya Otomo, Shin Ichi Shamoto, Hideo Hosono

研究成果: Article同行評審

33 引文 斯高帕斯(Scopus)

摘要

Manganese oxyarsenide hydrides LaMnAsO1-xHx (x=0-0.73) were synthesized by a solid-state reaction under a high pressure of 2 GPa. The hydride ions H- in O2- sites induced an insulator-to-metal conversion and suppressed the antiferromagnetic ordering of Mn spins. Instead, ferromagnetism with negative magnetoresistance was observed. The Curie temperature and saturated moment per Mn increased with x up to 264 K and 1.5μB, respectively, at x=0.73. These results indicate that H- donate conduction electrons to the MnAs layer, mediating a direct ferromagnetic interaction between Mn atoms.

原文English
文章編號020401
期刊Physical Review B - Condensed Matter and Materials Physics
87
發行號2
DOIs
出版狀態Published - 2013 1月 2

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

指紋

深入研究「From antiferromagnetic insulator to ferromagnetic metal: Effects of hydrogen substitution in LaMnAsO」主題。共同形成了獨特的指紋。

引用此