Abstract
We theoretically and experimentally investigate magnetization reversal and associated spin-wave dynamics of isolated threefold vertices that constitute a Kagome lattice. The three permalloy macrospins making up the vertex have an elliptical cross section and a uniform thickness. We study the dc magnetization curve and the frequency versus field curves (dispersions) of those spin-wave modes that produce the largest response. We also investigate each macrospin reversal from a dynamic perspective, by performing micromagnetic simulations of the reversal processes, and revealing their relationships to the soft-mode profile calculated at the equilibrium state immediately before reversal. The theoretical results are compared with the measured magnetization curves and ferromagnetic resonance spectra. The agreement achieved suggests that a much deeper understanding of magnetization reversal and accompanying hysteresis can be achieved by combining theoretical calculations with static and dynamic magnetization experiments.
| Original language | English |
|---|---|
| Article number | 014421 |
| Journal | Physical Review B |
| Volume | 97 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 18 2018 |
Bibliographical note
Publisher Copyright:© 2018 American Physical Society.
Funding
Work at Northwestern was supported by the NSF under Grant No. DMR 1507058. Work at the University of Kentucky was supported by the NSF under Grant No. DMR 1506979. Work at Argonne was supported by the U.S. Department of Energy (DOE), Office of Science, Materials Science and Engineering Division. Use was made of the Center for Nanoscale Materials, an Office of Science user facility, which is supported by DOE, Office of Science, Basic Energy Science under Contract No. DE-AC02-06CH11357.
| Funders | Funder number |
|---|---|
| Department of Energy Basic Energy Science Program | |
| Materials Science and Engineering Division | |
| U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China | |
| U.S. Department of Energy Oak Ridge National Laboratory U.S. Department of Energy National Science Foundation National Energy Research Scientific Computing Center | |
| National Science Foundation Office of International Science and Engineering |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics