Figure 2: Temperature evolution of the μSR relaxation in Yb2+xTi2−xO7+δ under pressure.
From: Ground state selection under pressure in the quantum pyrochlore magnet Yb2Ti2O7
(a–c) Refer to the x=0 and (d–f) refer to the x=0.046 sample. (a) The drastic increase of relaxation observed upon decreasing temperature in the x=0 sample indicates a spin freezing under an applied pressure P=19.7 kbar, which is absent under zero pressure (b) and for the x=0.046 sample (d). (c) The temperature evolution of the magnetic fraction is reported for various pressures. The black horizontal dashed line represents a volume magnetic fraction of 50%, used as a criterion to define Tc. (e,f) For the x=0.046 sample, only a moderate increase of the spin dynamics is observed under applied pressure. The error bars of the μSR relaxation data are of statistical origin and correspond to the square root of the total number of detected positrons resulting from muon decays. Error bars of the relaxation rate λ represent standard deviation of the fit parameters. Error bars of the magnetic fraction represent standard deviation of the fit parameters, with a minimal value of 0.05 corresponding to the typical error on the total asymmetry for μSR under pressure.
