Journal
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Volume 64, Issue 4, Pages -Publisher
SCIENCE PRESS
DOI: 10.1007/s11433-020-1657-7
Keywords
Sm-Co; permanent magnet; nanoparticles; morphology evolution; ultrahigh coercivity
Categories
Funding
- National Natural Science Foundation of China [52031001, 91960101]
Ask authors/readers for more resources
This study synthesized SmCox nanoparticles and proposed an evolution model for different morphological characteristics. The SmCo4.79 nanoparticles demonstrated ultrahigh coercivity and good alignment potential, which could be promising for applications in superstable or nanocomposite magnets.
Sm-Co nanoparticles (NPs) are promising candidates for preparing superstable magnets and exchange-coupled nanocomposite magnets with unprecedented magnetic properties. However, the morphology evolution of the NPs remains unclear. Here, single crystalline SmCox (x = 4.07, 4.79, 6.94, and 8.61) NPs with dimensions below the critical size of a single magnetic domain were synthesized. These NPs consist of Sm2Co7, SmCo5, and Sm2Co17 phases with divergent typical morphologies. An evolution model for the different morphological characteristics was proposed based on phase-structure changes and surface-energy calculations using the density functional theory. The results show that these SmCo4.79 NPs can be well aligned along the easy magnetization axis and exhibit an ultrahigh coercivity of 5.7 T, thus enabling to advance the control of NP morphology and to facilitate their use in superstable or nanocomposite magnets.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available