title: Polarization in RMnO3 multiferroics.
abstract: Some comments on the review by Sim et al. [(2016). Acta Cryst. B72, 3-19] are given. The review is devoted to hexagonal multiferroics RMnO3, in which there are ferroelectric and magnetic orders. Strong interaction between these orders causes a series of interesting properties of multiferroics.
authors.affiliation: Institute of Metal Physics of UB of RAS, Ekaterinburg, Russia.
authors.forename: A N
authors.initials: AN
authors.lastname: Pirogov
keywords: ferroelectricity; magnetic frustration; magnetic structures; multiferroic materials; spin-phonon coupling