Open AccessWet‐chemistry approach for the synthesis of single phase ferromagnetic Co 3 C nanoparticle
Author(s) -
Shen Xianfeng,
Ma Chenwei,
Suo HaiYun,
Zhang Tianfu,
Yan Lai,
Huang Lichun,
Zhou Jianqiang,
Wen Xiaodong,
Li Yongwang,
Yang Yong
Publication year - 2021
Publication title -
nano select
Language(s) - English
Resource type - Journals
ISSN - 2688-4011
DOI - 10.1002/nano.202000260
Subject(s) - coercivity , nanoparticle , nucleation , ferromagnetism , materials science , cobalt , carbide , magnetization , phase (matter) , magnetic nanoparticles , superparamagnetism , saturation (graph theory) , spin glass , particle size , chemical engineering , nanotechnology , condensed matter physics , chemistry , magnetic field , metallurgy , organic chemistry , physics , mathematics , quantum mechanics , combinatorics , engineering
Cobalt carbides nanoparticles have great potential as novel materials in magnetic fields. However, it is difficult to synthesize single phase cobalt carbides, especially Co 3 C. In this paper, we propose a one‐pot wet‐chemistry approach to synthesize single phase ferromagnetic Co 3 C without using any alkali as nucleation solvent. The particle size of Co 3 C nanoparticle is about 3 nm. The magnetic properties of Co 3 C nanoparticles are measured at 300 K from –30 to 30 kOe. Compared with Co 2 C, Co 3 C exhibits a large saturation magnetization of 46.1 emu g –1 and a high coercivity of 1.5 kOe. Small amount of carbon and small particle size of the Co 3 C nanoparticle are believed to contribute to large magnetization and high coercivity. Magnetic measurements also reveal the spin glass behavior caused by the small Co 3 C nanoparticle at the spin freezing temperature of 43 K. This work provides a facile method to synthesize single phase Co 3 C nanoparticle which is applicable in magnetic field.