Microwave-assisted magnetization reversal in a Co/Pd multilayer with perpendicular magnetic anisotropy

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Microwave-assisted magnetization reversal in a Co/Pd multilayer with perpendicular magnetic anisotropy

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Article
Kyushu Univ. Production Kyushu Univ. Production
Responsibility:
Nozaki, Yukio(Department of Electronics, Kyushu University)
Narita, Naoyuki(Department of Electronics, Kyushu University)
Tanaka, Terumitsu(Department of Electronics, Kyushu University)

Matsuyama, Kimihide(Department of Electronics, Kyushu University)
能崎, 幸雄(九州大学大学院システム情報科学研究院情報エレクトロニクス部門)
成田, 直幸(九州大学大学院システム情報科学研究院情報エレクトロニクス部門)
田中, 輝光(九州大学大学院システム情報科学研究院情報エレクトロニクス部門)
松山, 公秀(九州大学大学院システム情報科学研究院情報エレクトロニクス部門)

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Language:
English
Publication info:
Applied Physics Letters. 95, pp. 082505-, 2009-08-24. American Institute of Physics,AIP
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Publisher
Abstract:
Microwave-assisted magnetization reversal in a rectangle of a Co/Pd multilayer with a perpendicular magnetic anisotropy is examined using vector network analyzer ferromagnetic resonance (FMR) spectroscopy. A microwave field is applied along the in-plane direction of the rectangle together with a negative dc easy-axis field smaller than the coercive field. Broadening or splitting of the peak profile in the FMR spectrum suggesting the formation of multidomain structure appears after the microwave field is applied. The dominance of microwave-assisted nucleation of magnetization is supported by the frequency dependence of the probability with which the multidomain structure appears. Read more
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