Background:structures and facts 1.2 (a)35K 0.8 0.6 Tb/D T.Arima et al. 02 PRL96,097202(2006) -0.500.5 b axis 12 (b) 5K 1 0.8 Q.cp TbMnO; Sixe 04 0.2 0 -0.2 .1 -0.5 0 0.5 1 b axisT. Arima et al. PRL 96, 097202(2006) TbMnO3 Background: structures and facts