Valence state-dependent ferromagnetism in Mn-doped NiO thin films

Wensheng Yan; Zhihu Sun; Zhongrui Li; Qinghua Liu; Tao Yao; Zhiyun Pan; Chao Wang; Fengchun Hu; Yong Jiang; Zeming Qi; Fei Zeng; Shiqiang Wei

doi:10.1002/adma.201103436

Valence state-dependent ferromagnetism in Mn-doped NiO thin films

Adv Mater. 2012 Jan 17;24(3):353-7. doi: 10.1002/adma.201103436. Epub 2011 Nov 22.

Authors

Wensheng Yan¹, Zhihu Sun, Zhongrui Li, Qinghua Liu, Tao Yao, Zhiyun Pan, Chao Wang, Fengchun Hu, Yong Jiang, Zeming Qi, Fei Zeng, Shiqiang Wei

Affiliation

¹ National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China. [email protected].

PMID: 22105946
DOI: 10.1002/adma.201103436

Abstract

Manipulating the ferromagnetism of diluted magnetic semiconductors by tuning the valence state of doped ions is found to be achievable in Mn-doped NiO. First-principles calculations predict that the interactions between substitutional Mn(3+) ions in NiO are ferromagnetic, while the Mn(2+)-Mn(2+) interactions are antiferromagnetic. This scenario is experimentally supported by a great enhancement of saturation magnetization with increased Mn(3+)/Mn(2+) ratio in Mn-doped and (Mn, Li)-codoped NiO.

Keywords: Mn-doped NiO; XAFS; ferromagnetism.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Magnets / chemistry*
Manganese / chemistry*
Models, Molecular
Molecular Conformation
Nickel / chemistry*

Substances

Manganese
Nickel
nickel monoxide