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Suh, Joonki
Semiconductor Nanotechnology Lab.
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A scalable molecule-based magnetic thin film for spin-thermoelectric energy conversion

Author(s)
Oh, InseonPark, JungminChoe, DaeseongJo, JunhyeonJeong, HyeonjungJin, Mi-JinJo, YounghunSuh, JoonkiMin, Byoung-ChulYoo, Jung-Woo
Issued Date
2021-02
DOI
10.1038/s41467-021-21058-x
URI
https://scholarworks.unist.ac.kr/handle/201301/49713
Fulltext
https://www.nature.com/articles/s41467-021-21058-x
Citation
NATURE COMMUNICATIONS, v.12, no.1, pp.1057
Abstract
Spin thermoelectrics, an emerging thermoelectric technology, offers energy harvesting from waste heat with potential advantages of scalability and energy conversion efficiency, thanks to orthogonal paths for heat and charge flow. However, magnetic insulators previously used for spin thermoelectrics pose challenges for scale-up due to high temperature processing and difficulty in large-area deposition. Here, we introduce a molecule-based magnetic film for spin thermoelectric applications because it entails versatile synthetic routes in addition to weak spin-lattice interaction and low thermal conductivity. Thin films of Cr-II[Cr-III(CN)(6)], Prussian blue analogue, electrochemically deposited on Cr electrodes at room temperature show effective spin thermoelectricity. Moreover, the ferromagnetic resonance studies exhibit an extremely low Gilbert damping constant -(2.4 +/- 0.67) x10(-4), indicating low loss of heat-generated magnons. The demonstrated STE applications of a new class of magnet will pave the way for versatile recycling of ubiquitous waste heat.
Publisher
NATURE RESEARCH
ISSN
2041-1723
Keyword
THERMAL-CONDUCTIVITYORDERING TEMPERATURE

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