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Title: Variable-temperature inelastic light scattering spectroscopy of nickel oxide: Disentangling phonons and magnons

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4983810· OSTI ID:1473873

We report the 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 substantially above the Néel temperature (TN=523 K). Tuning the intensity of the excitation laser provides a method for disentangling the features of magnons from acoustic phonons in AF materials without the application of a magnetic field. Our results are useful for the interpretation of the inelastic-light scattering spectrum of NiO and add to the knowledge of its magnon properties important for THz spintronic devices.

Research Organization:
Univ. of California, Riverside, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012670
OSTI ID:
1473873
Alternate ID(s):
OSTI ID: 1361902
Journal Information:
Applied Physics Letters, Vol. 110, Issue 20; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (8)

The Discrete Noise of Magnons text January 2018
Magnon and phonon thermometry with inelastic light scattering journal February 2018
A Study of Quantum Confinement Effects in Ultrathin NiO Films Performed by Experiment and Theory journal June 2018
Tris(ethylene diamine) nickel acetate as a promising precursor for hole transport layer in planar structured perovskite solar cells journal January 2018
Magnetic characteristics of epitaxial NiO films studied by Raman spectroscopy text January 2020
Spin-phonon coupling in antiferromagnetic nickel oxide journal December 2017
The discrete noise of magnons journal March 2019
Acoustic phonon spectrum engineering in bulk crystals via incorporation of dopant atoms journal May 2018

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