Two Displacive Ferroelectric Phase Transitions in Multiferroic Quadruple Perovskite $BiM{n}_7{O}_{12}$

A. Maia, M. Kempa, V. Bovtun +6

We report on the microwave, terahertz (THz), infrared and Raman spectroscopic studies of $BiM{n}_7{O}_{12}$ ceramics, shedding more light into the nature of two structural phase tran…