2014/07/17 by A.V. Malakhovskii, A. V. Malakhovskii, S. L. Gnatchenko +11
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Crystal Structures and Properties #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mineralogy and Gemology Studies #Optical and Acousto-Optic Technologies #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1407.4585
17 pages, 25 figures
arxiv created 2014/07/17 · openalex publication_date 2014/07/17 · arxiv updated 2014/07/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Polarized absorption spectra of single-crystal Nd0.5Gd0.5Fe3(BO3)4 were studied in the region of transition 4I9/2-(4G5/2+2G7/2) in Nd3+ ion as a function of temperature (2-34 K) and magnetic field (0-65 kOe). Spectra of natural circular dichroism were measured in the range of 5-40 K. It was found out that the local magnetic properties in vicinity of the excited ion substantially depend on its state. In particular, a weak ferromagnetic moment appears in some excited states. It was found out that selection rules for electron transitions in magnetically ordered state substantially deviate from those in paramagnetic state of the crystal. They are different for different transitions and they are very sensitive to orientation of the sublattice magnetic moment relative to the light polarization. In the spectrum of the natural circular dichroism, the transition is revealed which is not observed in the absorption spectrum.