Nonvolatile magneto-thermal switching driven by vortex trapping in commercial In-Sn solder
arXiv:2408.14824 · doi:10.35848/1882-0786/adb6ee
Abstract
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 (γ-phase) after field cooling, which is the evidence that vortex trapping also works on achieving nonvolatile MTS in phase-separated superconducting composites.
14 pages, 5 figures
References in corpus (6)
- Above-room-temperature giant thermal conductivity switching in spintronic multilayer
- Observation of nonvolatile magneto-thermal switching in superconductors
- Magneto-thermal-switching properties of superconducting Nb
- Large magneto-thermal-switching ratio in superconducting Pb wires
- Large self-heating by trapped-flux reduction in Sn-Pb solders
- Nonvolatile Magneto-Thermal Switching in MgB2