Current-Induced Domain-Wall Motion in [CoFe/Pt] Nanowire With Perpendicular Magnetic Anisotropy

We experimentally demonstrate the current-induced domain wall motion in [CoFe/Pt] 5 nanowire with perpendicular magnetic anisotropy. By use of the scanning MOKE measurement, we observe that two domain walls are moved simultaneously by spin polarized current at the current density of 1.43 times 10 12...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 45; no. 10; pp. 3773 - 3775
Main Authors Kab-Jin Kim, Jae-Chul Lee, Young Jin Cho, Chang-Won Lee, Kyung-Ho Shin, Sunae Seo, Kyung-Jin Lee, Hyun-Woo Lee, Sug-Bong Choe
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2009
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Critical current density
Current density
Current induced
domain wall motion
Magnetic domain walls
Magnetic films
Magnetism
Materials science and technology
Nanoscale devices
Perpendicular magnetic anisotropy
Physics
Scanning electron microscopy
Semiconductor films
spin transfer torque
thermal activation
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Summary:We experimentally demonstrate the current-induced domain wall motion in [CoFe/Pt] 5 nanowire with perpendicular magnetic anisotropy. By use of the scanning MOKE measurement, we observe that two domain walls are moved simultaneously by spin polarized current at the current density of 1.43 times 10 12 A/m 2 . The domain wall speed is estimated to be about 1.5 m/s, determined by the domain wall displacement (750 nm) and the current pulse duration (500 ns). From in situ resistance measurement, the temperature of the nanowire rises up to 700 K when the domain wall moves at such the high current density.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2009.2025605