| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Characterization of crystallographic and magnetic domain structures in magnetic alloys using complementary TEM techniques |
| Author(s) |
Takehiro Tamaoka, Yuto Tomita, Yasukazu Murakami |
| On-Site Speaker (Planned) |
Takehiro Tamaoka |
| Abstract Scope |
Complex crystallographic and magnetic domain structures in magnetic alloys are investigated using complementary TEM techniques, including selected-area electron diffraction (SAED), dark-field transmission electron microscopy (DF-TEM), and electron holography. In Fe-N system, Fe<sub>16</sub>N<sub>2</sub> phase has been shown to exhibit giant magnetization exceeding the upper limit predicted by the Slater–Pauling curve. However, the intrinsic properties of Fe<sub>16</sub>N<sub>2</sub> remain under debate due to the presence of other magnetic phases, such as Fe and Fe<sub>4</sub>N. Utilizing complementary TEM techniques, we elucidated the relationship between the crystallographic structure (morphology, size, and crystal orientation) and magnetic flux in Fe<sub>16</sub>N<sub>2</sub> phase. [1] In the presentation, we will also discuss recent advances in methods for evaluating magnetic and crystallographic properties using TEM apparatus.
[1] T. Tamaoka et al., Shape Memo. and Superelasticity, 9 (2023) 293-299 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Magnetic Materials, |