Charge Structure of the Combined System (La_0.6Sr_0.4MnO₃)_0.7(La_0.6Sr_0.4FeO₃)_0.3as Investigated by Mössbauer Spectroscopy

The charge structures of (LSMO) and of the combined system $(La _0.6Sr_0.4FeO_3$(LSMO) and of the combined system (La_0.6Sr_0.4MnO_3)_0.7(La_0.6Sr_0.4/FeO_3)_0.3$are investigated by using M$\ddot{o}$ssbauer spectroscopy. The antiferromagnetically ordered $(La_0.6Sr_0.4FeO_3$(LSFO) has possible charges of Fe³⁺ and Fe⁴⁺$, which include a low-spin $Fe⁴⁺$ state at and above 230 K. The temperature dependences of the M$\ddot{o}$ssbauer spectra for the $(La _0.6Sr_0.4FeO_3$ system and for the combined $(LSMO) _0.7(LSFO)_0.3$ system are fitted as three sets of Zeeman patterns corresponding to $Fe³⁺$ and $Fe⁴⁺ below 230 K. At and above 230 K, the fitted M$\ddot{o}$ssbauer spectra for the combined system are the same in all temperature ranges. Above 230 K, $(La_0.6Sr_0.4FeO_3$ spectrum consists of two sets of six Lorentzians for $Fe³⁺$ and one line for low spin $Fe⁴⁺$. It is worth noting that large fields are induced in the combined system.