Abstract
Cr2O3 emerges as a prominent candidate material for spintronics and magnetoelectronic applications. However, a comprehensive understanding of its temperature-dependent spin dynamics remains elusive, impeding the engineering of novel spintronics based on this material. We delve into this through a combination of inelastic neutron scattering experiments and atomistic simulations. Our results unveiled the emergence of paramagnons above and below TN. We demonstrated 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.
| Original language | English |
|---|---|
| Article number | 064413 |
| Journal | Physical Review B |
| Volume | 110 |
| Issue number | 6 |
| DOIs | |
| State | Published - Aug 1 2024 |
Funding
Q.S., Y.S., and C.L. are supported by the U.S. Department of Energy under Award No. DE-SC0023874. B.W. acknowledges the support of the National Science Foundation of China (No. 12304040), China Postdoctoral Science Foundation (2023M742004), and the State Key Laboratory of New Ceramic and Fine Processing Tsinghua University (No. KF202304). This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.