About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Structure and Magnetic Properties of Novel High-magnetization Fe-Mn Powders Synthesized by Hydrogen Reduction of Nanoferrites |
Author(s) |
Tatsuya Kon, Nobuyoshi Imaoka , Kimihiro Ozaki |
On-Site Speaker (Planned) |
Tatsuya Kon |
Abstract Scope |
We have previously reported a study of novel Fe-Mn powders doped with 0.1–0.2 at% manganese prepared by the reduction of (Fe,Mn)3O4 nanopowders using hydrogen gas. We detected the presence of manganese in bcc iron phase in the Fe-Mn powders using X-ray absorption fine structure spectroscopy (XAFS). The Fe-Mn powders exhibited coercivity values ranging between 0.1–1 Oe. The saturation magnetization of the Fe-Mn powders was comparable with that of bulk pure iron, i.e., 218 emu/g. The presence of manganese in bcc iron phase should normally reduce the magnetization and increase coercivity. We discuss the relationship between the magnetic properties and structure of the Fe-Mn powders investigated via detailed magnetization measurements, analysis using Mössbauer spectroscopy, transmission electron microscopy and XAFS. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |