Magnetic susceptibility of Ni(OH)2 monolayer nanoclusters
書誌事項
- 公開日
- 1998-10-01
- DOI
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- 10.1016/s0304-8853(98)00222-4
- 公開者
- Elsevier BV
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説明
Abstract DC magnetic susceptibilities χ were measured for Ni(OH) 2 monolayer nanoclusters (Ni-MNC) which were randomly comprised by amorphous SiO 2 . The χ showed the Curie–Weiss behavior between about 100 and 300 K, and it deviated from the Curie–Weiss law below about 100 K. The χ -data were compared with the high temperature series expansion (HTSE) theory for 2D Ising ferromagnet, and it was found that the short range order effect in the 2D Ising system was dominant for the magnetism of Ni-MNC between 16 and 100 K. The analysis by the superparamagnetic model showed a gradual increase of the ferromagnetic Ni 2+ cluster size in each Ni-MNC. The quantum size effect in Ni-MNC was also discussed by the modified HTSE theory.
収録刊行物
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- Journal of Magnetism and Magnetic Materials
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Journal of Magnetism and Magnetic Materials 189 62-68, 1998-10-01
Elsevier BV