“…However, even in the simplest oxide, LaFeO 3 , [10,[12][13][14][15] a weak ferromagnetism has been observed linked to either a spin canting or to the Dzyaloshinskii-Moriya (DM) antisymmetrical interactions. Similar behavior was observed in La 1/3 Sr 2/3 FeO 3 perovskites [16]. The magnetic properties of Cu doped perovskites could be very different as a result of the multivalent ions, the change in the magnetic moment due to the charge transfer phenomena between the metal and the oxygen and the change of the exchange interactions rule as a result of the different structural distortions.…”