实现百万大气压下磁性测量技术

（Superconductivity in titanium probed by AC magnetic susceptibility to 120 GPa）

J. Song, H. Y. Liu, X. C. Wang, and C. Q. Jin

Chinese Physics B 34, 047403 (2025)

We used a highly sensitive AC magnetic susceptibility technique to probe superconductivity in elemental titanium (Ti) under extreme pressures to 120 GPa in a diamond anvil cell (DAC). The measurements reveal that the critical temperature (Tc) of Ti rises monotonically with increasing pressure, reaching 6.1 K at 120 GPa. Our results confirm the bulk nature of the superconductivity in Ti, as evidenced by a robust diamagnetic response in the AC magnetic susceptibility. Our work provides a routine technique to probe Meissner effect of elemental superconductors at megabar pressures.