Observation of nonvolatile magneto-thermal switching in superconductors

Applying a magnetic field to a solid changes its thermal-transport properties. Although such magneto-thermal-transport phenomena are usually small effects, giant magneto-thermal resistance has recently been observed in spintronic materials and superconductors, opening up new possibilities in thermal...

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Bibliographic Details
Published in:Communications materials 2024-03, Vol.5 (1), p.34-8, Article 34
Main Authors: Arima, Hiroto, Kasem, Md. Riad, Sepehri-Amin, Hossein, Ando, Fuyuki, Uchida, Ken-ichi, Kinoshita, Yuto, Tokunaga, Masashi, Mizuguchi, Yoshikazu
Format: Article
Language:English
Subjects:
639/301/1005/1007
639/301/119/1003
Chemistry and Materials Science
Heat conductivity
Heat transfer
Lead
Magnetic fields
Magnetic flux
Magnetic properties
Materials Science
Solders
Superconductors
Switching
Thermal conductivity
Thermal management
Thermal resistance
Tin
Transport phenomena
Transport properties
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Summary:Applying a magnetic field to a solid changes its thermal-transport properties. Although such magneto-thermal-transport phenomena are usually small effects, giant magneto-thermal resistance has recently been observed in spintronic materials and superconductors, opening up new possibilities in thermal management technologies. However, the thermal conductivity conventionally changes only when a magnetic field is applied due to the absence of nonvolatility, which limits potential applications of thermal switching devices. Here, we report the observation of nonvolatile thermal switching that changes the electron thermal conductivity when a magnetic field is applied and retains the value even when the field is turned off. This unconventional magneto-thermal switching arises in commercial Sn-Pb solders and is realized by phase-separated superconducting states and resultant nonuniform magnetic flux distributions. This result confirms the versatility of the observed phenomenon and aids the development of active solid-state thermal management devices. Giant magneto-thermal resistance has been recently observed in spintronic materials and superconductors, with exciting prospects in thermal management technologies. Here, nonvolatile thermal switching by magnetic field is demonstrated in commercial Sn-Pb solders, with electron thermal conductivity retaining its value even when the field is turned off.
ISSN:2662-4443
2662-4443
DOI:10.1038/s43246-024-00465-9