Frequency dependence of microwave-assisted switching in CoCrPt granular perpendicular media

Nobuaki Kikuchi; Kyohei Shimada; Takehito Shimatsu; Satoshi Okamoto; Osamu Kitakami

doi:10.7567/JJAP.57.09TE02

Frequency dependence of microwave-assisted switching in CoCrPt granular perpendicular media

Nobuaki Kikuchi, Kyohei Shimada, Takehito Shimatsu, Satoshi Okamoto, Osamu Kitakami

Tohoku University

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

6 Citations (Scopus)

Abstract

The microwave-assisted switching properties of a CoCrPt–TiO₂ granular perpendicular medium are investigated by detecting the anomalous Hall effect. We improved the device structure to be able to generate a linearly polarized microwave field of 950 Oe without a significant increase in temperature. Coercivity decreases linearly with increasing microwave frequency and the microwave assistance effect is most enhanced by the application of microwaves of 18 GHz frequency with a coercivity reduction ratio of 55%.

Original language	English
Article number	09TE02
Journal	Japanese Journal of Applied Physics
Volume	57
Issue number	9
DOIs	https://doi.org/10.7567/JJAP.57.09TE02
Publication status	Published - 2018 Sept

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abstract = "The microwave-assisted switching properties of a CoCrPt–TiO2 granular perpendicular medium are investigated by detecting the anomalous Hall effect. We improved the device structure to be able to generate a linearly polarized microwave field of 950 Oe without a significant increase in temperature. Coercivity decreases linearly with increasing microwave frequency and the microwave assistance effect is most enhanced by the application of microwaves of 18 GHz frequency with a coercivity reduction ratio of 55%.",

author = "Nobuaki Kikuchi and Kyohei Shimada and Takehito Shimatsu and Satoshi Okamoto and Osamu Kitakami",

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AU - Kitakami, Osamu

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N2 - The microwave-assisted switching properties of a CoCrPt–TiO2 granular perpendicular medium are investigated by detecting the anomalous Hall effect. We improved the device structure to be able to generate a linearly polarized microwave field of 950 Oe without a significant increase in temperature. Coercivity decreases linearly with increasing microwave frequency and the microwave assistance effect is most enhanced by the application of microwaves of 18 GHz frequency with a coercivity reduction ratio of 55%.

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Frequency dependence of microwave-assisted switching in CoCrPt granular perpendicular media

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