Optical Investigations of YbCrO3 under High Magnetic Fields-1-Yb3+ Absorption Spectra

  • Kojima Norimichi
    Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606
  • Okada Hiroaki
    Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606
  • Kawarazaki Morihiro
    Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606
  • Mogi Iwao
    Institute for Materials Research, Tohoku University, Sendai 980
  • Takeda Masayasu
    Institute for Materials Research, Tohoku University, Sendai 980
  • Kido Giyu
    Institute for Materials Research, Tohoku University, Sendai 980
  • Nakagawa Yasuaki
    Institute for Materials Research, Tohoku University, Sendai 980
  • Tsushima Kuniro
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka 820

書誌事項

タイトル別名
  • Optical Investigations of YbCrO3 under High Magnetic Fields. I. Yb3+ Absorption Spectra.
  • Optical Investigations of YbCrO3 under
  • Optical Investigations of YbCrO<sub>3</sub>under High Magnetic Fields. I. Yb<sup>3+</sup>Absorption Spectra

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抄録

Optical absorption spectra corresponding to the2F7/22F5/2 transition of Yb3+ in YbCrO3were investigated under high magnetic fields. The energy positions ofthese spectra remarkably changed at the metamagnetic transition wherethe weak ferromagnetic moment of the Cr3+ spins reverses itsdirection. From the analysis of the spectral change at the transition, the microscopic mechanism of the metamagnetic transition wereelucidated. In the energy region of the 2F7/22F5/2 transition of Yb3+, besides single-ion excitations, cooperative absorption spectra corresponding to the Yb3+ excitoncoupled with Cr3+ magnon and the Yb3+ exciton coupled withYb3+ spin-flip were observed. From the analysis of thesecooperative absorption spectra, the behavior of the Cr3+ magnonmode and the Yb3+ spin-flip mode under high magnetic fields wasinvestigated.

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