Low Temperature Physics: 45, 928 (2019); https://doi.org/10.1063/1.5116545
Fizika Nizkikh Temperatur: Volume 45, Number 8 (August 2019), p. 1084-1091    ( to contents , go back )

Peculiarities of splitting of Nd3+ Kramers doublets in antiferromagnetic crystal NdFe3(BO3)4 in external magnetic field

S.L. Gnatchenko, I.S. Kachur, V.S. Kurnosov, V.G. Piryatinskaya

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
E-mail: piryatinskaya@ilt.kharkov.ua

A.V. Malakhovskii, and I.A. Gudim

Институт физики им. Л.В. Киренского, ФИЦ КНЦ СО РАН Академгородок, 50, г. Красноярск, 660036, Россия
pos Анотація:

Received April 16, 2019, published online June 26, 2019

Abstract

Optical absorption spectra of easy-plane antiferromagnet NdFe3(BO3)4 in the region of the transition 4I9/22H11/2 of Nd3+ ion were studied in the temperature range 2–35 K and in external magnetic fields up to 65 kOe directed both along the C3 axis and in the basal plane of the crystal. The splitting values of Nd3+ excited states in the exchange field of Fe3+ subsystem and g-factors of 2H11/2 multiplet states were determined. Non-trivial dependences of splitting of some Nd3+ states on magnetic field point to the existence of anisotropic Fe–Nd exchange interaction for these excited states.

Key words: rare-earth ferroborate, absorption spectra, f–f transitions.

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