We have investigated spin-doping effects on the valence-band electronic structure of Sr1-(x+y)Lax+yTi1-xCr xO3 at y = 0.2 using high-resolution photoemission spectroscopy and first-principles band structure calculations. The Cr 3d photoemission spectral weight located between 2.0 and 3.5 eV increased with x, indicating that x works as a rough measure of the spin density. However, the increase in the spectral weight was actually more rapid than the band theory prediction. The near-Fermi level (EF) weight due to the Ti 3d states showed significant reduction with x. Considering that the band theory predicted nearly constant density of states near EF, this reduction of the near-EF weight should be interpreted as a manifestation of strong Ti-Cr site disorder effects.
|ジャーナル||Journal of Electron Spectroscopy and Related Phenomena|
|出版ステータス||Published - 2011 4月|
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