| Issue |
EPL
Volume 147, Number 3, August 2024
|
|
|---|---|---|
| Article Number | 36003 | |
| Number of page(s) | 7 | |
| Section | Condensed matter and materials physics | |
| DOI | https://doi.org/10.1209/0295-5075/ad6802 | |
| Published online | 21 August 2024 | |
Large self-heating by trapped-flux reduction in Sn-Pb solders
1 Department of Physics, Tokyo Metropolitan University - Hachioji 192-0397, Japan
2 AIST, 1-1-1 Umezono, Tsukuba - Ibaraki 305-8560, Japan
Received: 4 July 2024
Accepted: 26 July 2024
Magnetic flux trapping in field-cooled (FC) Sn-Pb solders has been recently studied because of the observation of nonvolatile magneto-thermal switching (Arima H. et al., Commun. Mater., 5 (2024) 34) and anomalous magnetic field-temperature (H-T) phase diagrams (Murakami T. et al., AIP Adv., 13 (2023) 125008). In this paper, we investigate the origin of the anomalously low specific heat (C) in Sn10-Pb90 and Sn45-Pb55 solders after FC at H = 1500 Oe. We show that the FC solders exhibit self-heating possibly caused by the flux flow during the reduction of trapped fluxes when heating the sample during the C measurements. The T dependence of T rise clearly exhibits unexpectedly large values when the low-C states are observed. In addition, the cause of the transition-like behavior in C-T of FC solders is explained by local heating during H control and flux-jump phenomena.
© 2024 The author(s)
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