Fig. 1: NMR signals of EuIn2As2 at zero external magnetic field.

a Crystal structure of EuIn2As2 drawn by VESTA28. The solid line represents the unit cell. b 153Eu NMR spectra observed at 1.6 K. c 75As and 115In NMR spectra observed at 1.5 K. The absorption peaks for each nucleus are pointed out by red and blue arrows. The black arrow points to the frequency where another absorption peak for the 115In is expected to be detected. d Temperature dependence of the internal fields at 153Eu (right axis), 75As, and 115In (left axis) nuclei. The solid lines are guides to the eyes.