期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 528, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2021.167772
关键词
Ferromagnetic resonance; van der Waals crystal; Magnetic domain
资金
- National Key Research and Development Program of China [2016YFA0300703]
- National Natural Science Foundation of China [11734006, 11974079]
- Shanghai Municipal Science and Technology Major Project [2019SHZDZX01]
- U.S. National Science Foundation [ECCS-1941426]
- NRF - Korean Government [NRF-2018R1D1A1B07047114]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2019R1A6A3A01091209]
The magnetization dynamics of CrI3 and CrBr3 were investigated using broadband ferromagnetic resonance (FMR) techniques, revealing the significant influence of multi-domain structures on the magnetic dynamics properties. Additionally, the linewidths of FMR spectra in CrI3 and CrBr3 were found to be dominated by magnetic inhomogeneous broadening.
Two-dimensional (2D) magnetic van der Waals crystals have received great attentions recently owing to their novel electronic and magnetic properties and rich potentials for low-dimensional and high-density spintronic devices. We investigated the magnetization dynamics of CrI3 and CrBr3 bulk single crystals by utilizing broadband ferromagnetic resonance (FMR) in a frequency range of 1 - 40 GHz and over a wide temperature range of 10 - 300 K. Complex features observed in the FMR spectra are quantitatively described by the multi-domain FMR theory. The minimum resonance frequency f(min) in FMR spectra was recognized and analyzed as characteristics of the transition of the domain structure. Micromagnetic simulation on the domain structure and spin dynamics explains that the multi-domain structure exists under strong in-plane magnetic field for CrI3 and CrBr3 and significantly influences the magnetic dynamics properties. Our results also suggest that the linewidths of FMR spectra in CrI3 and CrBr3 are dominated by the magnetic inhomogeneous broadening.
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