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- Duck-Ho Kim
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
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- Sang-Cheol Yoo
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
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- Dae-Yun Kim
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
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- Kyoung-Woong Moon
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
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- Soong-Geun Je
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
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- Cheong-Gu Cho
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
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- Byoung-Chul Min
- Center for Spintronics Research, Korea Institute of Science and Technology 2 , Seoul 136-791, South Korea
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- Sug-Bong Choe
- Center for Subwavelength Optics and Department of Physics, Seoul National University 1 , Seoul 151-742, South Korea
抄録
<jats:p>We report an experimental observation that indicates that a direct relation exists between the speed of the magnetic domain-wall (DW) motion and the magnitude of the perpendicular magnetic anisotropy (PMA) in Pt/Co/Pt films. It is found that by changing the thicknesses of the nonmagnetic Pt layers, the PMA magnitude can be varied significantly and the field-driven DW speed can also be modified by a factor of up to 50 under the same magnetic field. Interestingly, the DW speed exhibits a clear scaling behavior with respect to the PMA magnitude. A theory based on the DW creep criticality successfully explains the observed scaling exponent between the DW speed and the PMA magnitude. The presented results offer a method of maximizing the DW speed in DW-mediated nanodevices without altering the thickness of the magnetic Co layer.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 104 (14), 142410-, 2014-04-07
AIP Publishing