Fig. 4: Stray-field detection of the CrSBr phase transition.
From: Nitrogen-vacancy magnetometry of CrSBr by diamond membrane transfer
a Stray field as a function of the position below the phase transition temperature. b Stray field vs temperature and position showing the magnetic phase transition. For each temperature, the measured stray field at T = 157 K was subtracted to compensate for a background variation in the ESR frequency caused by the static field inhomogeneity (also see Supplementary Fig. 6). c Normalized stray field vs temperature. The error bars represent the fit uncertainty of the peak amplitude (± 1 s.d.). To extract the critical temperature Tc, we use a simple polynomial equation \(\propto 1-{(T/{T}_{c})}^{\beta }\) to fit the data, finding a phase transition temperature of Tc = 130(1) K in reasonable agreement with ref. 45 (see Supplementary Fig. 4 for the measurement at various microwave and laser powers).
