Lattice and magnetic dynamics in polar chiral incommensurate antiferromagnet Ni${}_2$InSbO${}_6$

Abstract

Complex systems with coexisting polarity, chirality and incommensurate magnetism are of great interest because they open new degrees of freedom in interaction between different subsystems and therefore they host a plethora of intriguing physical properties. Here we report on optical properties and lattice and spin dynamics of Ni${}_2$InSbO${}_6$ single crystals studied with the use of polarized optical microscopy and micro-Raman spectroscopy in the temperature range 10-300 K. Ni${}_2$InSbO${}_6$ crystallizes in a polar structure described by the noncentrosymmetric space group R3 and two types of structural domains were visualized due to natural optical activity of opposite chirality. Raman tensor elements of most A and E phonons along with their symmetry were determined. The manifestation of LO-TO splitting was observed for the A modes. By tracking the temperature dependencies of phonon frequencies the well pronounced spin-phonon interaction was observed for several modes below and above the Néel transition temperature TN = 76 K. In antiferromagnetic phase a wide excitation centred at 247 cm-1 was detected and assigned to the two-magnon mode and this value was used for estimating exchange parameters through linear spin-wave theory calculations.

arXiv comment10 pages, 7 figures

References in corpus (15)

• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
• Band structure diagram paths based on crystallography
• Linear spin wave theory for single-Q incommensurate magnetic structures
• Antiferromagnetic opto-spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• Raman tensor elements of $\beta {\text{-Ga}}_2{\text{O}}_3$
• Anomalous polarization dependence of Raman scattering and crystallographic orientation of black phosphorus
• Phonon Magnetochiral Effect
• Successive magnetic field-induced transitions and colossal magnetoelectric effect in Ni${}_3$TeO${}_6$
• Ni3TeO6 - a collinear antiferromagnet with ferromagnetic honeycomb planes
• Spin and Dipole Ordering in Ni_2InSbO_6 and Ni_2ScSbO_6 with corundum-related structure
• Lattice and spin dynamics in a low-symmetry antiferromagnet NiWO${}_4$
• Lattice dynamics and a magnetic-structural phase transition in the nickel orthoborate $N{i}_3(B{O}_3{)}_2$
• Microwave Magneto-Chiral Effect in a Noncentro-symmetric Magnet CuB2O4

Cited by in corpus (3)

• Metamagnetic transitions and magnetoelectric responses in a chiral polar helimagnet Ni${}_2$InSbO${}_6$
• Neutron diffraction in MnSb2O6: Magnetic and structural domains in a helicoidal polar magnet with coupled chiralities
• Spin Excitation in Coupled Honeycomb Lattice Ni${}_2$InSbO${}_6$