Magnetic circular dichroism and absorption of HoFe3(BO3)4 crystal in the region of f–f transitions 5I8 → 5F2 and 5F3
A.V. Malakhovskii, V.V. Sokolov, and I.A. Gudim
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Received December 13, 2019, published online May 26, 2020
Magnetic circular dichroism (MCD) and absorption spectra of multiferroic HoFe3(BO3)4 were measured in the region of f transitions 5I8 → 5F2 and 5F3 at T = 90 К. The absorption spectra were decomposed into the Lorentz shape components and intensities of transitions were obtained. With the help of the MCD and absorption spectra, the Zeeman splitting of some transitions was found. The MCD spectra and the Zeeman splitting were theoretically analyzed in the approximation of the |J, ± MJ〉 wave functions of the free atom, and using the conception of the crystal quantum number. A peculiarity of application of this conception to ions with integer moments was revealed and modification of the con-ception was suggested. Unusually strong vibronic repetitions of electron transitions from excited sublevels of the ground multiplet were observed.
Key words: magnetic circular dichroism, f–ftransitions, rare earth ferroborates.