Magnetic properties of monodisperse NiHx nanoparticles and comparison to those of monodisperse Ni nanoparticles.
Magnetic properties of monodisperse NiHx nanoparticles and comparison to those of monodisperse Ni nanoparticles.
复制标题
DOI：
10.1021/jp050489o
复制
发表时间：
2005-06
期刊：
影响因子：
--
通讯作者：
Y. Jeon;G. Lee;Jeunghee Park;Bongsoo Kim;Yongmin Chang
中科院分区：
文献类型：
--
作者：
Y. Jeon;G. Lee;Jeunghee Park;Bongsoo Kim;Yongmin Chang
我们首次制备了粒径为7.0 nm的单分散NiH（x）纳米颗粒，并研究了其磁性能。我们还制备了与NiH（x）纳米颗粒具有几乎相同粒径的单分散Ni纳米颗粒作为比较。NiH（x）纳米颗粒的磁性与Ni纳米颗粒的磁性有很大的不同。我们在NiH（x）纳米颗粒中观察到两个组成相，类似于块体材料：一个是几乎纯的Ni相，阻断温度（T（B））为11 K，另一个是氢化物相。我们在Ni纳米颗粒中观察到40 K的T（B）。
We produced, for the first time, monodisperse NiH(x) nanoparticles with particle diameters of 7.0 nm and investigated their magnetic properties. We also produced monodisperse Ni nanoparticles with nearly the same particle diameters as those of NiH(x) nanoparticles as a comparison. The magnetic properties of NiH(x) nanoparticles were quite different from those of Ni nanoparticles. We observed two compositional phases in NiH(x) nanoparticles, similar to bulk material: one is the nearly pure Ni phase with the blocking temperature (T(B)) of 11 K and the other is the hydride phase. We observed T(B) of 40 K in Ni nanoparticles.