Suppression of the Weak-Localization Effect due to a Domain Wall in Mesoscopic Wires of Ferromagnetic Metals : Condensed Matter: Electronic Properties, etc.
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概要
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We study the weak-localization (WL) effect in mesoscopic wires of ferromagnetic metals, focusing on the decoherence caused by a magnetic domain wall (DW). The decoherence leads to suppression of the WL correction to conductance. A real-space approach is presented to describe the WL effect which explicitly takes into account the location of a DW. If the length L of a wire is much smaller than the phase coherence length L_φ, The WL correction is shown to depend on the location of the DW. In the opposite limit of L≫L_φ≫W (W: thickness of the DW), it is shown that the DW reduces the WL correction by a factor of (1-W/2L) compared with that in the absence of the DW. The influence of the DW on the amplitude of the Altshuler-Aronov-Spivak oscillation in a metallic ring partially replaced by a ferromagnetic wire is also discussed.
- 社団法人日本物理学会の論文
- 2000-02-15
著者
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Takane Yositake
Department Of Physical Electronics Hiroshima University
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Koyama Yasusi
Department Of Electrical Engineering Akita National College Of Technology
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Koyama Yasusi
Department Of Computer And Mathematical Science Graduate School Of Information Sciences Tohoku Unive
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Takane Yositake
Department Of Applied Physics Osaka City University
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