Figure. (IMAGE)
Caption
Schematic of a conventional spin Seebeck device and a trans-scale spin Seebeck device. In the conventional structure (a), only spin currents generated in the vicinity of the interface between the ferromagnetic material (FM) and the normal metal (NM) contribute to the spin Seebeck effect, as illustrated in (c). In the trans-scale composite developed in this work (b), the metal phase is distributed three-dimensionally throughout the material, allowing spin-current generation and thermoelectric conversion via the spin Seebeck effect throughout the bulk, as illustrated in (d). Panel (e) compares the thickness dependence of the relative output power for the conventional and trans-scale structures.
Credit
Ken-ichi Uchida (National Institute for Materials Science)
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