Structure and random anisotropy in single-phase Ni nanocrystals
Structure and random anisotropy in single-phase Ni nanocrystals
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单相镍纳米晶的结构和随机各向异性
DOI:
10.1063/1.2188597
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发表时间:
2006
影响因子:
4
通讯作者:
N. Ikeda
中科院分区:
文献类型:
--
作者:
E. Kita;N. Tsukuhara;Hidenori Sato;K. Ota;Hideto Yangaihara;H. Tanimoto;N. Ikeda
We prepared high-purity oxygen-free and single-phase Ni nanocrystals using the gas condensation and deposition method in order to examine the random anisotropy model (RAM). The grain size of an as-prepared sample was estimated to be 8–10nm. Thermal annealing increased grain sizes (D) up to 22nm. Clear D6 dependence of the coercive force on a grain size smaller than 13 nm was obtained for samples prepared on both plastic and KBr single-crystal substrates. For larger grain sizes, Hc decreased with D−1 and these results clearly conform to the RAM in single-element nanocrystal systems. A local anisotropy constant was estimated from the slope of the D6 relation and the peak of Hc at D=13nm.
DOI:
--
发表时间:
2002
期刊:
Phys.Rev.B 66
影响因子:
--
作者:
S.Saksi;H.Tanimoto;E.Kita;H.Mizubayashi
通讯作者:
H.Mizubayashi