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4 October 2022 Observation of nuclear-spin Seebeck effect in Pt/MnCO3 (Conference Presentation)
Takashi Kikkawa, Derek Reitz, Hiroaki Ito, Takahiko Makiuchi, Takahiro Sugimoto, Kakeru Tsunekawa, Shunsuke Daimon, Koichi Oyanagi, Rafael Ramos, Saburo Takahashi, Yuki Shiomi, Yaroslav Tserkovnyak, Eiji Saitoh
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Proceedings Volume PC12205, Spintronics XV; PC1220519 (2022) https://doi.org/10.1117/12.2632931
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
We report thermoelectric generation caused by nuclear spins in a solid: nuclear-spin Seebeck effect. The sample is a magnetically ordered material MnCO3 having a large nuclear spin (I = 5/2) of 55Mn nuclei and strong hyperfine coupling, with a Pt contact. In the system, we observe low-temperature thermoelectric signals down to 100 mK due to nuclear-spin excitation. The results were quantitatively reproduced by a theoretical calculation in which interfacial Korringa process is taken into consideration. The nuclear thermoelectric effect demonstrated here offers a new way for exploring thermoelectric science and technologies at ultralow temperatures.
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Takashi Kikkawa, Derek Reitz, Hiroaki Ito, Takahiko Makiuchi, Takahiro Sugimoto, Kakeru Tsunekawa, Shunsuke Daimon, Koichi Oyanagi, Rafael Ramos, Saburo Takahashi, Yuki Shiomi, Yaroslav Tserkovnyak, and Eiji Saitoh "Observation of nuclear-spin Seebeck effect in Pt/MnCO3 (Conference Presentation)", Proc. SPIE PC12205, Spintronics XV, PC1220519 (4 October 2022); https://doi.org/10.1117/12.2632931
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KEYWORDS
Thermoelectric materials
Magnetism
Platinum
Solids
Spintronics
Temperature sensors
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