Abstract
Raman scattering of a 0.44Pb(Mg1/3Nb2/3)O3-0.56PbTiO3 (PMN-56PT) single crystal was measured to examine the growing process of polar nanoregions (PNRs) of a PT rich relaxor in a paraelectric cubic phase. As a common nature of relaxors, the central peak (CP) intensity shows anomalies at three characteristic temperatures: Burns temperature TB ∼ 673 K, intermediate temperature T* ∼ 603 K, and cubic-tetragonal phase transition temperature TC-T ∼ 533 K. The highest temperature anomaly at TB is attributed to the local symmetry breaking due to the appearance of PNRs. While, T* is originated from the rapid growth of PNRs and their dynamic-static transition.
Acknowledgment
The authors are thankful to Mr. Rahaman and Mr. Yamada for their support in Raman scattering measurements.
Funding
This work has been supported in part by the JSPS KAKENHI Grant.