Abstract

Far-infrared transmission spectra of dysprosium and terbium iron garnet were measured between 10 and 150 cm⁻¹ at temperatures less than 20 K by Fourier-transform spectroscopy. The temperature and magnetic-field dependence of the transmission spectrum of dysprosium iron garnet was also observed. For dysprosium iron garnet, absorption lines at 22.6, 59.5, 44.0, and 65 cm⁻¹ were identified as low-lying electronic levels. Magnetic resonances at 13.5, 17.0, and 28.0 cm⁻¹ and phonon absorption lines at 81, 107, 112, and 145 cm⁻¹ were found. For terbium iron garnet, two electronic lines at 36 and 68.5 cm⁻¹ and four phonon lines at 80.5, 108, 112, and 145 cm⁻¹ were found.

© 1974 Optical Society of America

Infrared Lattice Spectra of Rare-Earth Aluminum, Gallium, and Iron Garnets

Neil T. McDevitt
J. Opt. Soc. Am. 59(9) 1240-1244 (1969)

Raman-active phonons in aluminum, gallium, and iron garnets*

Jin-Joo Song, P. B. Klein, R. L. Wadsack, M. Selders, S. Mroczkowski, and R. K. Chang
J. Opt. Soc. Am. 63(9) 1135-1140 (1973)

Optical Phonons in Iron Garnets

P. Grunberg, J. A. Koningstein, and L. G. Van Uitert
J. Opt. Soc. Am. 61(12) 1613-1617 (1971)

Far-infrared transmittance of Tb, Ho, Tm, Er, and Yb orthoferrite

B. Thomas Smith, Junya Yamamoto, and Ely E. Belli
J. Opt. Soc. Am. 65(5) 605-607 (1975)

Zeeman–Raman Transitions of Tb³⁺ in a Cubic Crystal*

J. A. Koningstein and G. Schaack
J. Opt. Soc. Am. 60(6) 755-758 (1970)