Characteristic field angular dependence of magnetization switching assisted by spin wave excitation

Takeshi Seki; Kyoko Hotta; Hiroshi Imamura; Yukio Nozaki; Koki Takanashi

doi:10.1063/1.4821208

Characteristic field angular dependence of magnetization switching assisted by spin wave excitation

Takeshi Seki, Kyoko Hotta, Hiroshi Imamura, Yukio Nozaki, Koki Takanashi

Department of Physics

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

8 Citations (Scopus)

Abstract

We found the characteristic dependence of magnetization switching assisted by spin wave excitation on the magnetic field angle (θ) for exchange-coupled L1₀-FePt/Permalloy bilayers, where θ was the angle from the easy magnetization axis of L1₀-FePt. Without the spin wave being excited, an incoherent switching occurred through the domain wall motion. The frequency for the switching field (H_sw) reduction under the spin wave excitation did not depend on θ. This characteristic dependence is attributable to less variation in the resonance frequencies of the spin waves against θ. We also increased the efficiency of the H _sw reduction further with θ.

Original language	English
Article number	122403
Journal	Applied Physics Letters
Volume	103
Issue number	12
DOIs	https://doi.org/10.1063/1.4821208
Publication status	Published - 2013 Sept 16

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Characteristic field angular dependence of magnetization switching assisted by spin wave excitation",

abstract = "We found the characteristic dependence of magnetization switching assisted by spin wave excitation on the magnetic field angle (θ) for exchange-coupled L10-FePt/Permalloy bilayers, where θ was the angle from the easy magnetization axis of L10-FePt. Without the spin wave being excited, an incoherent switching occurred through the domain wall motion. The frequency for the switching field (Hsw) reduction under the spin wave excitation did not depend on θ. This characteristic dependence is attributable to less variation in the resonance frequencies of the spin waves against θ. We also increased the efficiency of the H sw reduction further with θ.",

author = "Takeshi Seki and Kyoko Hotta and Hiroshi Imamura and Yukio Nozaki and Koki Takanashi",

note = "Funding Information: This work was partially supported by a Grant-in-Aid for Young Scientists A (25709056) and research grants from the Murata Science Foundation. The device was partly fabricated at Advanced Research Center of Metallic Glasses, IMR, Tohoku University.",

year = "2013",

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day = "16",

doi = "10.1063/1.4821208",

language = "English",

volume = "103",

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T1 - Characteristic field angular dependence of magnetization switching assisted by spin wave excitation

AU - Seki, Takeshi

AU - Hotta, Kyoko

AU - Imamura, Hiroshi

AU - Nozaki, Yukio

AU - Takanashi, Koki

N1 - Funding Information: This work was partially supported by a Grant-in-Aid for Young Scientists A (25709056) and research grants from the Murata Science Foundation. The device was partly fabricated at Advanced Research Center of Metallic Glasses, IMR, Tohoku University.

PY - 2013/9/16

Y1 - 2013/9/16

N2 - We found the characteristic dependence of magnetization switching assisted by spin wave excitation on the magnetic field angle (θ) for exchange-coupled L10-FePt/Permalloy bilayers, where θ was the angle from the easy magnetization axis of L10-FePt. Without the spin wave being excited, an incoherent switching occurred through the domain wall motion. The frequency for the switching field (Hsw) reduction under the spin wave excitation did not depend on θ. This characteristic dependence is attributable to less variation in the resonance frequencies of the spin waves against θ. We also increased the efficiency of the H sw reduction further with θ.

AB - We found the characteristic dependence of magnetization switching assisted by spin wave excitation on the magnetic field angle (θ) for exchange-coupled L10-FePt/Permalloy bilayers, where θ was the angle from the easy magnetization axis of L10-FePt. Without the spin wave being excited, an incoherent switching occurred through the domain wall motion. The frequency for the switching field (Hsw) reduction under the spin wave excitation did not depend on θ. This characteristic dependence is attributable to less variation in the resonance frequencies of the spin waves against θ. We also increased the efficiency of the H sw reduction further with θ.

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Characteristic field angular dependence of magnetization switching assisted by spin wave excitation

Abstract

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