Temperature induced Fr - Ft phase transition

The phase diagram for pzt solid solutions [21] has been revised when Noheda et al. [5] discovered a monoclinic phase in undoped pzt (7.5). Nevertheless, up to now there is no experimental evidence for the existence of a monoclinic structure in doped pzt above room 

Our results reveal the opposite effect for compositions next to the mpb which leads us to the conclusion that the monoclinic phase does not play an important role for the performance of doped pzt ceramics. 

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