Critical Asymmetry in Local Fluctuations in SrTiO3forT→Tc−

A critical asymmetry in local fluctuations of the rotational parameter $\varphi$ in SrTi${\mathrm{O}}_3$ for $T<\mathrm{}{T}_c$ and $〈\varphi 〉\ne 0$ is observed directly by the asymmetry $a_s$ of the paramagnetic resonance lines of ${\mathrm{Fe}}^{3+}-V_{\mathrm{O}}$ pair centers. The parameter $a_s$ increases in a critical manner for $T\to {T_c}^{-}$. It is postulated that such an asymmetry is a general property of second-order phase transitions.