| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-10-10 |
| タイトル |
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|
タイトル |
Phonon-enhanced spin-dependent Seebeck effect in magnetic carbon films |
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言語 |
ja |
| 言語 |
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言語 |
jpn |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Chao Wang
Zhi Yang
Qingkang Ren
Xiuhao Mo
Takashi Kikkawa
Shunsuke Daimon
Dongfeng Diao
Eiji Saitoh
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Disordered carbon offers untapped potential for spin caloritronics. We report a phonon-enhanced spin-dependent Seebeck effect (SDSE) in a magnetic carbon film (MCF) with graphene nano-crystallites (10 nm), interfaced with Pt. In a longitudinal setup, the transverse thermoelectric voltage (VISHE/ΔT) peaks at ~30 μV/K at 220 K, driven by a thermally induced spin current via the inverse spin Hall effect. Raman spectroscopy reveals a coincident G-band redshift peak, suggesting a phonon-spin resonance unique to MCF’s hybrid structure. X-ray absorption spectra confirm stable sp2 states, potentially mediating this effect. A multiple-sample study in addition reveals that smaller crystallites enhance SDSE. Unlike pristine graphene or insulators, MCF’s weak ferromagnetism and phonon dynamics yield an unconventional spin-thermal regime. This finding redefines carbon’s role in spin caloritronics, with tunable nano-crystallite size as a design parameter. |
| 書誌情報 |
Carbon
号 246,
p. 120909,
発行日 2025-10
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| 出版者 |
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出版者 |
Elsevier B.V. |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1016/j.carbon.2025.120909 |
