2025/09/18 by Slavin, V. V., Kachur, I. S., Kurnosov, V. S. +1
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Optics (physics.optics) #Strongly Correlated Electrons (cond-mat.str-el)
paper · doi:10.48550/arxiv.2509.22687
We study experimentally and theoretically optical absorption spectra of neodymium ferroborate in the temperature range 6-32 K. We show that the temperature dependences of integral intensities of absorption lines demonstrate qualitatively different behavior for σ- and π-polarizations of the light. We suggest that this behavior may be caused by the appearance of a spiral magnetic structure in the compound under study. To describe the temperature dependences of lines intensities we propose a theoretical model which takes into account the Dzyaloshinskii-Moriya interaction between Nd3+ and Fe3+ ions.