2021 Fiscal Year Final Research Report
Evolution of new magnetic materials with ultrahigh coercivity
| Project/Area Number |
19K15391
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 28030:Nanomaterials-related
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2019-04-01 – 2022-03-31
|
| Keywords | SmFe12 / Ultrahigh / Coercivity / Permanent / Magnet / Materials |
|---|
| Outline of Final Research Achievements |
We have succeeded in preparing (Sm,Zr)(Fe,Co,Ti)12 (ThMn12, I4/mmm) well-defined particles with ever-larger coercivity (Hc) and remanent magnetization (Mr) based on precise control over their crystallinity and microstructure using chemical synthesis. In particular, the synthesized (Sm,Zr)(Fe,Co,Ti)12 particles have high crystallinity, controllable grain-size and composition, and diverse surface from Sm-enriched and Ti-enriched to depleted surface.
The most important achievements for their Hc and Mr were as large as 1.6T and 1.2T, respectively, at 300 K for isotropic powders. This result is the world's highest performance for SmFe12-based permanent magnet materials. It is a breakthrough in the development of SmFe12-based permanent magnet materials, opening a new era of permanent magnets.
|
| Free Research Field |
Material chemistry
|
| Academic Significance and Societal Importance of the Research Achievements |
Through these studies, novel nanomaterials science called “nanoscale transformation science” and high performance permanent magnet materials are developed. The research achievement addresses the most pressing challenges of the rare-earth crisis for applications in energy-saving technologies.
|
