Magnetic Properties of Ni Nanoparticles and Ni(C) Nanocapsules

材料科学技术（英文）, 2002, 18(2): 99-100.

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1.Shenyang National Laboratory for Materials Science and International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

2.Department of Physics, Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong, China

3.Department of Physics, Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong, China

4.Shenyang National Laboratory for Materials Science and International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

5.Shenyang National Laboratory for Materials Science and International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

6.Department of Physics, Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong, China

7.Shenyang National Laboratory for Materials Science and International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

基金项目: Hong Kong RGC Grants(HKUST6111/98P) This work has been supported by the National Natural Science Foundation of China under(59725103)

Magnetic Properties of Ni Nanoparticles and Ni(C) Nanocapsules

Keywords： Nanoparticles

Structure and magnetic properties of Ni nanoparticles and Ni(C) nanocapsules were studied. The carbon atoms hardly affect the lattice of Ni to form Ni-C solid solution or nickel carbides. The large thermal irreversibility in zerofield-cooled and zero-field magnetization curves indicates magnetic blocking with a wide energy barrier. Saturation magnetization, remanent magnetization and coercivity of Ni(C) nanocapsules decrease with increasing temperature.

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Magnetic Properties of Ni Nanoparticles and Ni(C) Nanocapsules

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