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Content Provider | IEEE Xplore Digital Library |
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Author | Kab-Jin Kim Gi-Hong Gim Jae-Chul Lee Sung-Min Ahn Kang-Soo Lee Young Jin Cho Chang-Won Lee Sunae Seo Kyung-Ho Shin Sug-Bong Choe |
Copyright Year | 1965 |
Abstract | In this paper, we experimentally characterize the domain-wall depinning mechanism at notches of ferromagnetic nanowires with perpendicular magnetic anisotropy. A time-resolved magneto-optical Kerr effect detection reveals that the depinning time is exponentially proportional to the strength of external magnetic field. From an analysis based on Neacuteel-Brown theory, the depinning field and the activation volume are quantitatively determined for several notches with different gap distances. Interestingly, both the depinning field and the activation volume are proportional to the inverse of the gap distance. This is explained by the sizeable extrinsic effect from geometric constrictions in contrast to the intrinsic properties of the films. |
Sponsorship | IEEE Magnetics Society |
Starting Page | 4056 |
Ending Page | 4058 |
Page Count | 3 |
File Size | 423261 |
File Format | |
ISSN | 00189464 |
Volume Number | 45 |
Issue Number | 10 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2009-10-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Nanowires Perpendicular magnetic anisotropy Magnetic films Magnetic anisotropy Magnetic domains Magnetic domain walls Saturation magnetization Scanning electron microscopy Kerr effect Magnetic analysis perpendicular magnetic anisotropy Activation volume depinning field gap distance notch |
Content Type | Text |
Resource Type | Article |
Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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