Fig. 2. Zero field muon spin rotation.

Time evolution of the zero-field muon spin polarization of [(LaFeO₃)_m/(SrTiO₃)₅]₁₀ superlattices with a m = 3, b m = 2, and c m = 1. Solid lines represent fit by the stretched exponential function $A_0{\mathrm{e}}^{-{\left(\lambda t\right)}^{\beta }}$. Exponent β and depolarization rate λ as a function of temperature are shown in panels d and e, respectively; solid lines are a guide to the eye. The dashed line in e represents fit to m = 1 data by λ ~ T^−α. The error bars represent one standard deviation.