Dephasing due to Spin-Wave Excitations in Ferromagnetic Metals (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
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The dephasing due to spin-wave excitations is studied for ferromagnetic wires of mesoscopic dimensions in the diffusive regime. The spin-wave dephasing time τ_φ for conduction electrons is calculated as a function of temperature T on the basis of the s-d interaction model. It is shown that in the absence of an external magnetic field, the spin-wave dephasing in some cases becomes comparable to, or even dominates, the ordinary dephasing due to Coulomb interactions. It is also shown that if a magnetic field H is applied parallel to the wire, the spin-wave dephasing is exponentially suppressed with the increase of H at the low-temperature regime of γH ≫ T (γ: gyromagnetic ratio). This strong H-dependence can be used to examine the influence of the spin-wave dephasing on quantum interference corrections.
- 一般社団法人日本物理学会の論文
- 2003-05-15
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