1980 Volume 48 Issue 1 Pages 86-92
Optical absorption spectra in near infrared region were measured for dysprosium iron garnet (DyIG) in a temperature range from 3.8 K to above the compensation temperature θc by using a superconducting magnet up to 150 kOe. Energy levels of the excited states 6H7⁄2 and 6F9⁄2 are calculated in the presence of the combined crystal and exchange fields. The peak positions corresponding to the transitions to these levels from the lowest split component of the ground state 6H15⁄2 are calculated and compared with the observed ones. By choosing the best fit value of the effective field, the agreement between theory and, experiment is fairly good as regards the overall features of spectrum.
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