Valence state-dependent ferromagnetism in Mn-doped NiO thin films.
basic_science · Level V
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- Record sourced from PubMed, PMID 22105946.
- Also identified by DOI 10.1002/adma.201103436.
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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.
Medical subject headings
- Magnets
- Manganese
- Nickel