Dynamics of magnetization switching of exchange-coupled trilayers by using a micromagnetic simulation
- Authors
- Kim, K. S.; Lee, H. J.; Lim, S. H.
- Issue Date
- 9월-2008
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- dynamics of magnetization switching; exchange-coupled trilayers; magnetic random access memory; micromagnetic simulation
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.53, no.3, pp.1492 - 1497
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 53
- Number
- 3
- Start Page
- 1492
- End Page
- 1497
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/122769
- DOI
- 10.3938/jkps.53.1492
- ISSN
- 0374-4884
- Abstract
- A micromagnetic simulation of the dynamics of magnetization switching is performed in exchange-coupled trilayers consisting of two ferromagnetic layers separated by a very thin non-magnetic spacer. The elliptical magnetic thin films with lateral dimensions of 200 run (long axis) x 100 nm (short axis) and with a total magnetic layer thickness of 4 nm are considered. The spin-flop field and the saturation field obtained under static conditions are found to vary significantly with the thickness asymmetry, but a much smaller dependence is observed in the direct write field. The dynamics of magnetization switching is characterized by an abrupt, coherent rotation, followed by oscillations that eventually die out at a pulse duration time of 10 similar to 20 ns, depending oil the magnetization component and the final magnetic state. The coherent rotation occurs at a short pulse duration time of 1 similar to 2 ns. The oscillations in the two magnetic layers are completely in phase and the frequency estimated from a Fourier analysis is 1.0 GHz. A large difference in the dynamic switching behavior is also observed to exist, depending on the final magnetic state.
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