Inelastic Light Scattering Spectroscopy of Magnons and Phonons in Nickel Oxide: Effects of Temperature

Abstract

We report results of an investigation of the temperature dependence of the magnon and phonon frequencies in NiO. A combination of Brillouin - Mandelstam and Raman spectroscopies allowed us to elucidate the evolution of the phonon and magnon spectral signatures from the Brillouin zone center (GHz range) to the second-order peaks from the zone boundary (THz range). The temperature-dependent behavior of the magnon and phonon bands in the NiO spectrum indicates the presence of antiferromagnetic (AF) order fluctuation or a persistent AF state at temperatures above the Neel temperature (T=523 K). Tuning the intensity of the excitation laser provides a method for disentangling the features of magnons from acoustic phonons without the application of a magnetic field. Our results are useful for interpretation of the inelastic-light scattering spectrum of NiO, and add to the knowledge of its magnon properties important for THz spintronic devices.

12 pages; 4 figures

References in corpus (2)

• Antiferromagnonic Spin Transport from Y${}_3$Fe${}_5$O${}_{12}$ into NiO
• Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator

Cited by in corpus (8)

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• Magnetic characteristics of epitaxial NiO films studied by Raman spectroscopy
• Acoustic Phonon Dispersion Engineering in Bulk Crystals via Incorporation of Dopant Atoms
• The Discrete Noise of Magnons
• Density Functional description of spin, lattice, and spin-lattice dynamics in antiferromagnetic and paramagnetic phases at finite temperatures
• DFT-Guided Operando Raman Characterization of Ni-Based Phases Relevant to Electrochemical Systems
• Disentangling electrical switching of antiferromagnetic NiO using high magnetic fields
• Brillouin-Mandelstam Light Scattering Spectroscopy: Applications in Phononics and Spintronics