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Thermal rectification in jointless Pb solid wire
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DOI：10.1088/2515-7639/ae24af.png)
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Abstract
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Thermal rectification is observed in jointless Pb wires at temperatures near the superconducting transition of Pb under magnetic fields. Using a different magnetic-field (H) response to the temperature dependence of the thermal conductivity (κ–T) under H//J and H⊥J where J is heat flow, we fabricated a jointless thermal diode. Thermal rectification is observed with a thermal rectification ratio (TRR) of 1.5 and the difference in κ of 330 W m−1 K−1 at T = 5.11 K under H = 400 Oe for a Pb wire with a 50%-bent (H⊥J) and 50%-straight (H//J) structure. The peak temperature of TRR can be tuned by the strength of the applied magnetic field. By changing the bending ratio to 40%-bent, a higher TRR exceeding two was observed. The Pb-jointless thermal diode will be a useful material for thermal management at cryogenic temperatures.
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APPLIED PHYSICS REVIEWS
APPLIED PHYSICS REVIEWSIF11.6
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