Observation of Spin Locking in Dysprosium through a Nonlinear AC Magnetic Response
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概要
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Previous research has used neutron diffraction, thermal expansion, and ultrasound attenuation to investigate commensurate turn angle effects (``spin locking'') in the helical magnetic region of dysprosium (Dy). We have succeeded in observing many of those spin locking states, allowing for the coexistence of incommensurate and commensurate states, through an AC magnetic response, mainly the first- (M_{1\omega}) and third- (M_{3\omega}) harmonic responses. This is physically equal to detecting the Rayleigh loop, thus reflecting the irreversible displacement of the domain wall. The characteristic M_{3\omega} signals at the 10^{-8} emu level have been detected using the median of twenty or fifty data points for the detection accuracy to reach the 10^{-9} emu level.
- 2011-06-15
著者
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MITO Masaki
Faculty of Engineering, Kyushu Institute of Technology
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TAKAGI Seishi
Faculty of Engineering, Kyushu Institute of Technology
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Deguchi Hiroyuki
Faculty Of Engineering Doshisha University
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Iriguchi Kazuyuki
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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Taniguchi Yukitada
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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Kawase Masayoshi
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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