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Nonvolatile magneto-thermal switching driven by vortex trapping in commercial In-Sn solder by Rani, Poonam; Murakami, Takumi; Watanabe, Yuto; Sepehri-Amin, Hossein; Arima, Hiroto; Yamashita, Aichi; Mizuguchi, Yoshikazu is a scholarly article available to read on EtoBox.

What is Nonvolatile magneto-thermal switching driven by vortex trapping in commercial In-Sn solder about?

Magneto-thermal switching (MTS) is a key technology for efficient thermal management. Recently, large MTS with nonvolatility has been observed in Sn-Pb solders [H. Arima et al., Commun. Mater. 5, 34 (2024)] where phase separation, different superconducting transition temperature (Tc) of Sn and Pb, and magnetic-flux trapping are the causes of the nonvolatile MTS. To further understand the mechanism and to obtain the strategy for enhancing switching ratio, exploration of new phase-separated superconductors with nonvolatile MTS is needed. Here, we show that the In52-Sn48 commercial solder is a phase-separated superconducting composite with two Tc and traps vortices after field cooling. A clear signature of nonvolatile MTS was observed at T = 2.5 K. From specific heat analyses, we conclude that the vortices are mainly trapped in the lower-Tc phase ({\gamma}-phase) after field cooling, which is the evidence that vortex trapping also works on achieving nonvolatile MTS in phase-separated superconducting composites.

Author

Rani, Poonam; Murakami, Takumi; Watanabe, Yuto; Sepehri-Amin, Hossein; Arima, Hiroto; Yamashita, Aichi; Mizuguchi, Yoshikazu

Published

2024

Language

EN