Fig. 3: Proton control of magnetism for VCr-PBA.
From: Molecular magneto-ionic proton sensor in solid-state proton battery

a Temperature dependence of magnetization of VCr-PBA before and after protonation. b Magnetic hysteresis loops measured at room temperature for VCr-PBA at various protonation levels. c The FMR spectra measured at room temperature and RF conditions for VCr-PBA. d Room-temperature FMR spectra under 1 GHz for VCr-PBA at different protonation levels. Source data are provided as a Source Data file.