Figure 3
From: Magnetoelectric coupling in the paramagnetic state of a metal-organic framework

Electron spin resonance spectra.
(a) The X-band ESR spectra at selected temperatures. A single paramagnetic resonance line is observed above 8.5 K while two resonance lines are observed below 8.5 K. (b) Temperature dependence of the ESR intensity. The blue solid line is the fit to the Curie-Weiss law. The deviation from the Curie-Weiss line at Tc indicate a change in the magnetic state following the PE-FE transition.