The Internal Bias Field of Ferroelectric (CH3NH3)5Bi2Br11
H. Pykacz, J. Mróz
Institute of Physics, Technical University of Wrocław, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

and R. Jakubas
Institute of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
Received: December 17, 1991; in final form: May 7, 1992
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Spontaneous polarization of (CH3NH3)5Bi2Br11 crystals has been measured and the ferroelectric hysteresis loop has been studied. The observed time changes in the polarization have been ascribed to the change in the internal bias field of the crystal. Measurement results have also been discussed for the lower phase transition (TII = 77 K).
DOI: 10.12693/APhysPolA.81.667
PACS numbers: 77.70.+a