B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
Институт физики им. Л.В. Киренского Сибирского отделения РАН Академгородок 50, г. Красноярск, 660036, Россия
Received August 19, 2016
Nontrivial dependence of polarizations of Kramers doublet 15971–15978 cm−1 absorption lines on external magnetic field was found in the range of optical transition 4I9/2 → 2H11/2 of Nd3+ ion in easy-plane antiferromagnet NdFe3(BO3)4 in transversal Zeeman effect geometry. Values of transversal g factor and effective field of exchange with Fe3+ magnetic subsystem were determined for the excited state of Nd3+ from the field dependence of the doublet splitting. Semiempirical equation was proposed for description of the field dependences of intensities of absorption lines polarized components corresponding to the Kramers doublet 15971–15978 cm−1. Excluding scaling coefficients, the equation contains as parameters only the values of exchange fields for ground and excited states that were determined independently.
PACS: 42.25.Bs Wave propagation, transmission and absorption; PACS: 42.25.Ja Polarization; PACS: 78.20.Ls Magneto-optical effects; PACS: 78.40.–q Absorption and reflection spectra: visible and ultraviolet.