Nonvolatile Magneto-Thermal Switching in MgB2

Abstract

Ongoing research explores thermal switching materials to control heat flow. Specifically, there has been interest in magneto-thermal switching (MTS) materials based on superconductors, which only exhibited switching behavior when a magnetic field was applied. However, a recent report highlighted nonvolatile MTS in commercial Sn-Pb solders, attributed to magnetic flux trapping. In this study, we focused on flux trapping in a type-II superconductor MgB2. Magnetization and thermal conductivity measurements under magnetic fields were conducted on polycrystalline MgB2. We confirmed that magnetic flux was indeed trapped in MgB2 even after demagnetization. Additionally, we observed nonvolatile MTS in MgB2 as well as Sn-Pb solders. These results suggest that the nonvolatile MTS may be a widespread characteristic of superconducting materials with flux trapping.

arXiv comment10 pages, 4 figures

References in corpus (8)

• Phononics: Manipulating heat flow with electronic analogs and beyond
• Strongly linked current flow in polycrystalline forms of the new superconductor MgB2
• Superconducting Properties of MgB2 Bulk Materials Prepared by High Pressure Sintering
• Definitive experimental evidence for two-band superconductivity in MgB2
• Electronic structure of MgB${}_2$ from angle-resolved photoemission spectroscopy
• Heat and Charge Transport Properties of MgB2
• Magneto-thermal-switching properties of superconducting Nb
• Two band gap field-dependent thermal conductivity of $Mg{B}_2$

Cited by in corpus (1)

• Nonvolatile magneto-thermal switching driven by vortex trapping in commercial In-Sn solder