Magnetic characterization of iron nanocubes
Magnetic characterization of iron nanocubes
复制标题
铁纳米立方体的磁性表征
DOI：
10.1063/1.3005985
复制
发表时间：
2008
影响因子：
3.2
通讯作者：
M. Farle
中科院分区：
文献类型：
--
作者：
A. Trunova;R. Meckenstock;I. Barsukov;C. Hassel;O. Margeat;M. Spasova;J. Lindner;M. Farle
采用湿化学法制备了具有（100）晶面、边长为13.6nm的近完整单晶Fe核壳结构纳米立方体。虽然核是金属的，但壳由Fe_3O_4或γ-Fe_2O_3组成。用扫描电子显微镜证实了立方体沉积在GaAs衬底上，单层覆盖。氧和氢等离子体被用来去除配体系统和氧化物壳。这两种类型的样品进行了研究，通过铁磁共振。当纯铁立方体的g因子（g=2.09）和晶体各向异性（K4=4.8×104 J/m3）与体相值一致时，饱和磁化强度降低到体相值的70%（M（5 K）=（1.2±0.12）×106 A/m），有效阻尼参数（α=0.03）相对于体相铁提高了一个数量级。
Nearly perfect single crystalline Fe core-shell nanocubes with (100) facets and 13.6 nm edge length were prepared by wet-chemical methods. While the core is metallic, the shell is composed of either Fe3O4 or γ-Fe2O3. The cubes were deposited onto GaAs substrates with monolayer coverage as proved by scanning electron microscopy. Oxygen and hydrogen plasmas were used to remove the ligand system and the oxide shell. Both types of samples were investigated by ferromagnetic resonance. While the g-factor (g=2.09) and crystalline anisotropy (K4=4.8×104 J/m3) of the pure iron cubes show up with bulk values, the saturation magnetization is reduced to (M(5K)=(1.2±0.12)×106 A/m) 70% of bulk value and the effective damping parameter (α=0.03) is increased by one order of magnitude with respect to bulk Fe.
影响因子：
4.6
作者：
Li, GX;Sun, SH;Wang, SX
通讯作者：
Wang, SX