Investigation of the electronic states of A-site layer-ordered double perovskite YBaCo2Ox (x = 5.3 and 6) thin films by x-ray spectroscopy
作者： Akira Chikamatsu , Tsukasa Katayama , Takahiro Maruyama , Miho Kitamura , Koji Horiba
DOI: 10.1063/5.0031096
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摘要: In this study, the electronic structures of A-site layer-ordered double perovskite YBaCo2O6 and YBaCo2O5.3 epitaxial thin films were investigated by x-ray photoemission spectroscopy (PES), absorption (XAS), magnetic circular dichroism (XMCD) measurements. The valence band PES spectrum film exhibited a finite density states (DOS) at Fermi energy (EF), while that no DOS EF, corresponding well with metallic insulating transport properties, respectively. Co L-edge XAS measurements revealed ions in are mixed state high-spin (HS) Co3+ (50%) intermediate spin (IS) Co4+ (50%), HS (80%) Co2+ (20%) coexist YBaCo2O5.3. XMCD led to conclusion both IS contribute ferromagnetism YBaCo2O6.
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