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

Abstract

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.

Authors:
 [1];  [2];  [2]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2];  [2];  [2]
  1. Univ. of California, Riverside, CA (United States); Univ. Federal do Rio de Janeiro (Brazil)
  2. Univ. of California, Riverside, CA (United States)
Publication Date:
Research Org.:
Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1473873
Alternate Identifier(s):
OSTI ID: 1361902
Grant/Contract Number:  
SC0012670
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 20; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Lacerda, M. M., Kargar, F., Aytan, E., Samnakay, R., Debnath, B., Li, J. X., Khitun, A., Lake, R. K., Shi, J., and Balandin, A. A. Variable-temperature inelastic light scattering spectroscopy of nickel oxide: Disentangling phonons and magnons. United States: N. p., 2017. Web. doi:10.1063/1.4983810.
Lacerda, M. M., Kargar, F., Aytan, E., Samnakay, R., Debnath, B., Li, J. X., Khitun, A., Lake, R. K., Shi, J., & Balandin, A. A. Variable-temperature inelastic light scattering spectroscopy of nickel oxide: Disentangling phonons and magnons. United States. doi:10.1063/1.4983810.
Lacerda, M. M., Kargar, F., Aytan, E., Samnakay, R., Debnath, B., Li, J. X., Khitun, A., Lake, R. K., Shi, J., and Balandin, A. A. Fri . "Variable-temperature inelastic light scattering spectroscopy of nickel oxide: Disentangling phonons and magnons". United States. doi:10.1063/1.4983810. https://www.osti.gov/servlets/purl/1473873.
@article{osti_1473873,
title = {Variable-temperature inelastic light scattering spectroscopy of nickel oxide: Disentangling phonons and magnons},
author = {Lacerda, M. M. and Kargar, F. and Aytan, E. and Samnakay, R. and Debnath, B. and Li, J. X. and Khitun, A. and Lake, R. K. and Shi, J. and Balandin, A. A.},
abstractNote = {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.},
doi = {10.1063/1.4983810},
journal = {Applied Physics Letters},
number = 20,
volume = 110,
place = {United States},
year = {Fri May 19 00:00:00 EDT 2017},
month = {Fri May 19 00:00:00 EDT 2017}
}

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Cited by: 5 works
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