About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Neutron and X-ray Scattering in Materials Science and Engineering
|
Presentation Title |
Scattering Study of Spin-Lattice Interactions in Chromia |
Author(s) |
Chen Li, Qiyang Su, Yaokun Su, Douglas L. Abernathy, António M. Dos Santos, Bianca Haberl |
On-Site Speaker (Planned) |
Chen Li |
Abstract Scope |
The spin-lattice interaction is pivotal in tailoring materials properties and developing novel spintronic devices. Cr2O3 emerges as a model material for understanding such interaction. In the current work, we combined neutron scattering and atomistic simulations to investigate the evolution of lattice/magnetic order/dynamics as a function of temperature and pressure. An enhancement of the magnetic diffraction intensity was observed with increasing pressure. Results from first-principles calculations reveal a strengthening of the easy-axis magnetic anisotropy from 0 to 20 GPa. The calculated exchange parameters show an enhancement of magnetic order at pressure. We also observed the emergence of paramagnons above/below TN and a significant softening of linear magnons upon heating in the antiferromagnetic state. Further analysis revealed that this softening primarily originated from four-magnon interactions, while thermal expansion played a minor role. These results provide valuable insights into characterizing and controlling the lattice and spin dynamics of spintronics and magnetoelectronic materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Computational Materials Science & Engineering, Other |