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Optical Spectrum of CoF2

J. P. Van Der Ziel and H. J. Guggenheim

  • Bell Telephone Laboratories, Murray Hill, New Jersey

Phys. Rev. 166, 479 – Published 10 February, 1968

DOI: https://doi.org/10.1103/PhysRev.166.479

Abstract

The polarized absorption of CoF2 has been studied from 0.4 to 2.0 μ. The spectrum consists of sharp magnetic-dipole lines followed on the high-energy side by structure with electric-dipole polarization. The Γ5+4 spin-allowed transition in the infrared is found to have magnetic-dipole-polarized magnon sidebands. The spin-forbidden transitions have magnon sidebands with electric-dipole polarization. Sidebands resulting from the simultaneous absorption of optical and low-energy excitons are also observed. The magnetic-field and temperature dependence of the absorption lines are reported.

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