Fig. 5: Magnetic properties for LuH2±xNy at different pressures.
a,b, Temperature dependence of magnetic moment (M) for LuH2±xNy at pressures of 1 GPa (a) and 2.1 GPa (b). The raw data are shown in the main panels. Insets, corresponding magnetic moments measured in ZFC and field-cooling (FC) modes with the background subtracted. c, M(H) curves with different background signals subtracted. Inset, raw data of M(H) curves at 100 K at pressures of 1.0 GPa (open square) and 2.1 GPa (circle), and one curve at 320 K under 2.1 GPa (upward triangle). The M(H) curve measured at 100 K for the empty HMD cell is also shown (solid square). d, Temperature dependence of ZFC–FC magnetizations measured on a superconducting sample (Cu,C)Ba2Ca3Cu4O11+δ (Tc = 112 K) with the same measured volume as that for LuH2±xNy shown in a and b; the same HMD set-up was used under the same magnetic field (H = 60 Oe; P = 0.3 GPa). If the phase LuH2±xNy were superconductive, one should observe a diamagnetic signal in the same scale at the same magnetic field (60 Oe).
