Fig. 2: Results of fits to muon spin relaxation (µSR) data collected on EMU.

Summation of refined asymmetry amplitude with each blue circle representing the value of the longitudinal relaxation, \({G}_{z}(t)\), modeled as a stretched exponential of the form \({G}_{z}\left(t\right)={A}_{0}+{A}_{1}{e}^{{\left(-\lambda t\right)}^{{{{{{\rm{\beta }}}}}}}}\) at t = 0 s for the given temperature. \({A}_{0}\), \({A}_{1}\), \(\lambda\), and β are all constants to model the exponential decay of the detected asymmetry (the difference in positrons produced in muon decay between the front and back detectors) as a function of time, \(t\). The vertical dashed line represents magnetic transition temperatures defined by the inflection point in the 2^nd derivative of the magnetization curve. Constant asymmetry values above 20% are expected for non-magnetic samples. When asymmetry drops to ~8-12%, a sample is exhibiting bulk magnetism^70,71. The error bars are reported from the asymmetry amplitude fit performed using the Mantidplot software⁶⁷.