Ni/Ni3C core-shell nanochains and its magnetic properties: one-step synthesis at low temperature.
One-dimensional Ni/Ni3C core-shell nanoball chains with an average diameter by around 30 nm were synthesized by means of a mild chemical solution method using a soft template of trioctylphosphine oxide (TOPO). It was revealed that the uniform Ni nanochains were capped with Ni3C thin shells by about 1-4 nm in thickness and each Ni core consists of polygrains. The coercivity of the core-shell nanochains is much enhanced (600 Oe at 5 K) and comparable with single Ni nanowires due to the one-dimensional shape anisotropy. Deriving from the distinctive structure of Ni core and Ni 3C shell, this architecture may possess a possible bifunctionality. This unique architecture is also useful for the study on the magnetization reversal mechanism of one-dimensional magnetic nanostructure.
Zhou
Wei
W
School of Materials Science and Engineering, School of Science, Beijing University of Aeronautics and Astronautics, Beijing 100083, People's Republic of China.
Zheng
Kun
K
He
Lin
L
Wang
Rongming
R
Guo
Lin
L
Chen
Chinping
C
Han
Xiaodong
X
Zhang
Ze
Z