Fig. 4

Magnetic structures of the perovskite-type Mn₂O₃. a Schematic representations of the magnetic structure in the commensurate high-temperature phase (49 K < T < 101 K). This structure is a longitudinal spin density wave with the unit cell eight times bigger than the cell of the parent \(R\bar 3\) (\(2\sqrt 2 a_{\mathrm{p}} \times 2\sqrt 2 a_{\mathrm{p}} \times \sqrt 3 a_{\mathrm{p}}\)) structure. It combines two types of the B-site and three types of the A-site Mn-layers stacked along the c-axis. b Schematic representations of the magnetic structure in the incommensurate low-temperature phase (T < 49 K). This structure combines both cycloidal and helical components. P refers to the induced electric polarization