Independent control of charge and spin density in Sr1 - (x + y) Lax + y Ti1 - x Crx O3 probed by photoemission spectroscopy

S. Kaneyoshi, H. Iwasawa, T. Saitoh*, Y. Aiura, D. Satoh, T. Katsufuji, I. Hase, M. Higashiguchi, K. Shimada, H. Namatame, M. Taniguchi, M. Kubota, K. Ono

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr1 - (x + y) Lax + y Ti1 - x Crx O3, in which the charge and spin density can be controlled. It was found that the near-Fermi level (EF) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-EF spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.

Original languageEnglish
Pages (from-to)e278-e280
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 2
DOIs
Publication statusPublished - 2007 Mar

Keywords

  • Electronic structure
  • Photoemission spectroscopy
  • SrTiO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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