Dielectric relaxation in ferroelectric mixed crystals system (CH3NH3)5Bi2Cl11(1-x)Br11x

摘要: The dielectric response of the mixed crystal system, (CH 3 NH ) 5 Bi 2 Cl 7.26 Br 3.74 (MAPCBB34) and 6.6 4.4 (MAPCBB40), in frequency range between 500 Hz 1 GHz is investigated vicinity para-ferroelectric phase transition. ferroelectric transition temperatures (T c found for MAPCBB34 MAPCBB40 are shifted towards lower temperature comparison to those pure analogues. → substitution strongly affects dynamic properties crystals. parameters relaxation compared closely related compounds.