Ce core-level spectroscopy, and magnetic and electrical transport properties of lightly Ce-doped YCoO3

Yoshihiko Kobayashi, Tsuyoshi Koike, Mario Okawa, Ryohei Takayanagi, Shohei Takei, Makoto Minohara, Masaki Kobayashi, Koji Horiba, Hiroshi Kumigashira, Akira Yasui, Eiji Ikenaga, Tomohiko Saitoh, Kichizo Asai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have investigated the Ce and Co core level spectroscopy, and the magnetic and electrical transport properties of lightly Ce-doped YCoO3. We have successfully synthesized single-phase Y1-xCexCoO3 for 0.0 ≤ x ≤ 0.1 by the sol-gel method. Hard X-ray photoelectron and X-ray absorption spectroscopy experiments reveal that the introduced Ce ions are tetravalent, which is considered to be the first case of electron doping into bulk trivalent Co oxides with perovskite RECoO3 (RE: rare-earth element or Y) caused by RE site substitution. The magnitude of the effective magnetic moment peff obtained from the temperature dependence of magnetic susceptibility χ(T) at higher temperatures is close to that for high-spin Co2+ introduced by the Ce doping, implying that the electrons doped into the Co site induce Co2+ with a highspin state. For x = 0.1, ferromagnetic ordering is observed below about 7 K. Electrical transport properties such as resistivity and thermoelectric power show that negative electron-like carriers are introduced by Ce substitution.

Original languageEnglish
Article number114704
Journaljournal of the physical society of japan
Volume85
Issue number11
DOIs
Publication statusPublished - 2016 Nov 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Ce core-level spectroscopy, and magnetic and electrical transport properties of lightly Ce-doped YCoO<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this

    Kobayashi, Y., Koike, T., Okawa, M., Takayanagi, R., Takei, S., Minohara, M., Kobayashi, M., Horiba, K., Kumigashira, H., Yasui, A., Ikenaga, E., Saitoh, T., & Asai, K. (2016). Ce core-level spectroscopy, and magnetic and electrical transport properties of lightly Ce-doped YCoO3 journal of the physical society of japan, 85(11), [114704]. https://doi.org/10.7566/JPSJ.85.114704