Related Experiment Video
Updated: May 14, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
A nanocrystalline Sm-Co compound for high-temperature permanent magnets
Zhexu Zhang1, Xiaoyan Song, Yinkai Qiao
1College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China.
This study reveals that Sm5Co19 exhibits exceptional intrinsic coercivity, surpassing other samarium-cobalt compounds. This makes nanocrystalline Sm5Co19 a prime candidate for developing advanced high-temperature permanent magnets.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Magnetism
Background:
- Samarium-cobalt (Sm-Co) compounds are crucial for high-performance magnets.
- Developing magnets with enhanced high-temperature performance remains a key challenge.
Purpose of the Study:
- To investigate the magnetic properties of the Sm5Co19 compound.
- To evaluate its potential for high-temperature permanent magnet applications.
Main Methods:
- Characterization of nanocrystalline Sm5Co19 as a single phase material.
- Analysis of intrinsic coercivity, Curie temperature, and coercivity temperature coefficient.
Main Results:
- Sm5Co19 demonstrates inherently high magnetic anisotropy and nanoscale grain size.
- Achieved intrinsic coercivity significantly exceeds that of other known Sm-Co compounds before orientation treatment.
- The material exhibits a high Curie temperature and a low coercivity temperature coefficient.
Conclusions:
- Nanocrystalline Sm5Co19 possesses a unique combination of properties suitable for demanding magnetic applications.
- Its ultrahigh intrinsic coercivity and thermal stability position it as a leading material for next-generation high-temperature permanent magnets.
More Related Videos
06:49Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
Published on: April 12, 2019
07:42Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Related Concept Videos
Ferromagnetism
Types Of Superconductors
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.