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Report No.
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Spin-wave-mediated spin Seebeck effect

Adachi, Hiroto; Oe, Junichiro; Takahashi, Saburo; Maekawa, Sadamichi

It has been a conventional wisdom that a spin current is carried by conduction electrons in metals. However, it was recently demonstrated that there exist another type of spin current carried by low-lying excitations of localized spins, i.e., the spin-wave excitations. One of the important feature of the latter spin current, which we call here a spin-wave spin current, is that it can propagate over a distance as long as several millimeters. Moreover, a recent report on the spin Seebeck effect in an insulating magnet provide us with a good opportunity to discuss the scenario of spin-wave-mediated spin Seebeck effect. In this talk, we focus on the spin Seebeck effect observed in an insulating magnet of yttrium iron garnet, and discuss the scenario of spin-wave-mediated spin Seebeck effect.

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