Phase transitions in the SrHfO3 perovskite measured with In-111/Cd-111 PAC

The temperature dependence of the hyperfine parameters in SrHfO3 powder sam ples has been investigated by means of Perturbed Angular Correlation spectr oscopy using implanted In-111 probes. Three quadrupole interactions have be en established, with the largest fraction showing a pronounced dynamic inte raction. We assign this fraction to In-111/Cd-111 probe atoms on substituti onal Hf sites. The temperature dependence of the dynamic interaction has be en associated to the Pnma <-> Imma phase transition at similar to 700 K. We discuss the results in relation to those obtained for Hf-181/Ta-111-probes in AHfO(3) (A = Ba, Sr, Ca) and for In-111/Cd-111-probes in PbZrO3 and BaT iO3.