Exciton Absorption Lines in Antiferromagnetic Rare-Earth Orthochromites : With Particular Reference to YCrO_3

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概要

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• A method of analyzing absorption spectra of Frenkel excitons associated with single-Cr^<3+&t; transitions in antiferromagnetic rare-earth orthochromites is presented for both cases with and without an external magnetic field. As the simplest example, exciton lines of YCrO_3 in the spectral region of ∼13,800 cm^<-1> are studied in detail both experimentally and theoretically. Four magnetic-dipole lines are assigned to Davydov-split exciton lines associated with one single-Cr^<3+> excitation, and matrix elements of excitation transfer in various Cr^<3+>-pairs are determined. It is considered that spinforbidden excitation transfer between the sublattices of opposite spins is released by a small canting of spins not responsible for the weak ferromagnetism. When a magnetic field along the crystal a-axis is increased up to 50 kOe, spin reorientation from the a-axis to the c-axis is observed in the change of intensities and polarizations of the exciton lines.

• 社団法人日本物理学会の論文
• 1971-09-05

著者

• TSUSHIMA Kuniro

  Broadcasting Science Research Laboratories of Nippon Hoso Kyokai (Japan Broadcasting Corporation)

• Tsushima Kuniro

  Department of Computer Science and Electronics, Kyushu Institute of Technology

• Aoyagi K

  Yamagata Univ. Yamagata

• Tsushima Kuniro

  Broadcasting Science Research Laboratories Of Japan Broadcasting Cooperation

• Tsushima K

  Department Of Computer Science And Electronics Kyushu Institute Of Technology

• Tsushima K

  Nhk Science And Technical Research Laboratories

• Tsushima Kuniro

  Broadcasting Science Research Laboratories O Nhk

• SUGANO Satoru

  Institute for Solid State Physics, The University of Tokyo

• AOYAGI Kiyoshi

  Broadcasting Science Research Laboratories of NHK

• Sugano Satoru

  Institute For Solid Physics University Of Tokyo

関連論文

• Optical Investigations of Rare-Earth Orthochromites.III.GdCrO_3 and Summary of the R' Band in RCrO_3
• Optical Investigations of YbCrO_3 under High Magnetic Fields. II. Cr^-Yb^ Two-Exciton Absorption
• Optical Investigations of YbCrO_3 under High Magnetic Fields. I. Yb^ Absorption Spectra
• Exciton Absorption Lines in Antiferromagnetic LuCrO_3
• Optical Spectrum of R'-Band in Spin Reorientated YbCrO_3 under High Magnetic Field
• Optical Absorption Spectrum in YbCrO_3 under High Magnetic Field
• Fine Structure of the R Absorption Lines of Cr^ in Antiferromagnetic Dysprosium Aluminum Garnet
• Zero-Lines and Their Magnon-Sidebands in Antiferromagnetic MnF_2
• Optical Investigations of Rare-Earth Orthochromites.II.RCrO_3(R=Er,Ho,Dy and Tb)
• Optical Investigations of YbCrO_3. III. : Cr^ Exciton- Yb^ Spin Flip Simultaneous Absorption
• Exciton Absorption Lines in Antiferromagnetic DyCrO_3
• Exciton Absorption Lines in Antiferromagnetic Rare-Earth Orthochromites : With Particular Reference to YCrO_3
• On the Absorption Spectra of Complex Ions, III The Calculation of the Crystalline Field Strength
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• Covalency in Ionic Crystals: KNiF_3
• Observation of Adiabatic Spin Reorientation in ErCrO_3
• LCAO-Xα-Force Study on Stable Structures of Si_6 and Si_ Clusters
• Interband Optical Transitions in Extremely Anisotropic Semiconductors : I. Bound and Unbound Exciton Absorption

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