Numerical analysis of successive ballistic rotations of magnetization caused by an application of sinusoidal magnetic fields

Yukio Nozaki; Kimihide Matsuyama

doi:10.1143/JJAP.45.L758

Numerical analysis of successive ballistic rotations of magnetization caused by an application of sinusoidal magnetic fields

Yukio Nozaki, Kimihide Matsuyama

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The magnetization reversal in a single-domain magnetic particle caused by a sinusoidal hard-axis field has been numerically studied for its application to magnetic random-access memories. The switching properties are analyzed as functions of the amplitude and frequency of the sinusoidal field. A sinusoidal field with a frequency higher than the magnetization relaxation frequency can induce successive ballistic trajectories of magnetization, which causes a large rotation surmounting the hard-axis direction. By choosing an appropriate frequency, it is found that the switching current amplitude can be reduced to one-fifth that of the static Stoner condition.

Original language	English
Pages (from-to)	L758-L760
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	45
Issue number	29-32
DOIs	https://doi.org/10.1143/JJAP.45.L758
Publication status	Published - 2006 Aug 11
Externally published	Yes

Keywords

Ferromagnetic resonance
MRAMs
Magnetization reversal

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

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N2 - The magnetization reversal in a single-domain magnetic particle caused by a sinusoidal hard-axis field has been numerically studied for its application to magnetic random-access memories. The switching properties are analyzed as functions of the amplitude and frequency of the sinusoidal field. A sinusoidal field with a frequency higher than the magnetization relaxation frequency can induce successive ballistic trajectories of magnetization, which causes a large rotation surmounting the hard-axis direction. By choosing an appropriate frequency, it is found that the switching current amplitude can be reduced to one-fifth that of the static Stoner condition.

AB - The magnetization reversal in a single-domain magnetic particle caused by a sinusoidal hard-axis field has been numerically studied for its application to magnetic random-access memories. The switching properties are analyzed as functions of the amplitude and frequency of the sinusoidal field. A sinusoidal field with a frequency higher than the magnetization relaxation frequency can induce successive ballistic trajectories of magnetization, which causes a large rotation surmounting the hard-axis direction. By choosing an appropriate frequency, it is found that the switching current amplitude can be reduced to one-fifth that of the static Stoner condition.

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