Coercivity of nanoporous Ni produced by dealloying

被引:26
作者
Hakamada, Masataka [1 ]
Takahashi, Masaki [2 ]
Furukawa, Toshiyuki [2 ]
Mabuchi, Mamoru [2 ]
机构
[1] Natl Inst Adv Ind Sci & Technol, Mat Res Inst Sustainable Dev, Moriyama Ku, Nagoya, Aichi 4638560, Japan
[2] Kyoto Univ, Grad Sch Energy Sci, Dept Energy Sci & Technol, Sakyo Ku, Kyoto 6068501, Japan
关键词
annealing; coercive force; nanoporous materials; nickel; MAGNETIC-PROPERTIES; PARTICLES; NANOPARTICLES; CLUSTERS; NICKEL; FE; CO;
D O I
10.1063/1.3119663
中图分类号
O59 [应用物理学];
学科分类号
摘要
Nanoporous Ni specimens with the ligament lengths of 10-210 nm were produced by the dealloying of Ni(0.25)Mn(0.75) alloy and annealing at 473-873 K. The coercivity (H(c)) increased with increasing ligament length (L) up to 50 nm, and decreased with increasing L above 50 nm. At L < 50 nm, the size dependence of H(c) for nanoporous Ni is lower than that for nanocrystalline Ni. The low size dependence of H(c) is discussed on basis of a random anisotropy model.
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页数:3
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