Micromagnetic Simulation of Microwave-Assisted Magnetization Switching Process for Granular Films
| Autor: | Terumitsu Tanaka, Kimihide Matsuyama, Yukio Nozaki |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Perpendicular magnetic anisotropy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Microwave assisted Electronic Optical and Magnetic Materials Magnetization Agglomerate Contour line 0103 physical sciences Electrical and Electronic Engineering 0210 nano-technology Saturation (magnetic) Microwave |
| Zdroj: | IEEE Transactions on Magnetics. 53:1-4 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2017.2697429 |
| Popis: | Microwave-assisted magnetization switching (MAS) processes for granular films were demonstrated by time integration of the Landau–Lifshitz–Gilbert equation. At low microwave frequencies, hysteresis loops become narrower, and at higher frequencies, an extra step occurs in the curves. In the case when the extra step occurs, saturation field increases to be comparable to that for non-MAS case, although switching field decreases. The occurrence of the extra step possibly originates from “unstable switching process” predicted by Bertotti et al., and the magnetization contour maps indicated large un-switched agglomerates remains when MAS proceeds through the unstable switching process. The unstable switching processes are also observed even when dc incident angles are large. |
| Databáze: | OpenAIRE |
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