Synchroton Soft X-ray Absorption Studies of YbFe$_{\mathrm{1-x}}$Mn$_{\mathrm{x}}$O$_{3}$ (0.0 $\le$ x $\le$ 1.0) Perovskites

This work aims to correlate the interplay between structure-bonding (O2p-TM3d) and magnetic properties (TM 3d) in YbFe$_{\mathrm{1-x}}$Mn$_{\mathrm{x}}$O$_{3}$ (0.0 $\le$ x $\le$ 1.0) perovskites which are synthesized by the solid state reaction method. We have investigated by XAS the O2p and the magnetic TM3d unoccupied states of YbFe$_{\mathrm{1-x}}$Mn$_{\mathrm{x}}$O$_{3}$ (0$\le $x$\le $1). We find that increasing Mn doping promotes the creation of new states at the O2p band, it also induces a shifts towards lower energies of the O K pre-edge (with reference to the O2p-TM3d hybridization) and changes the spectral distribution in the region of TM 4s, p -- O 2p- Yb 5d hybridization. These changes are most marked for x \textgreater 0.2. A correlated effect with Mn doping is observed in the Fe L$_{\mathrm{2,3}}$ spectra where again new electronic states and systematic changes are observed x \textgreater\ 0.2. This is in contrast with Mn L$_{2,3}$ spectra, where all the spectra are very similar except for x$=$0.2. Thus, we provide a comprehensive picture of the electronic structure evolution in the conduction band in these materials as a function of the Mn content.