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자연과학대학
물리학전공
Journal papers
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Two-dimensional correlation spectroscopy analysis of Raman spectra of NiO nanoparticles
Title
Two-dimensional correlation spectroscopy analysis of Raman spectra of NiO nanoparticles
Authors
Qiu J.
;
Nguyen T.H.
;
Kim S.
;
Lee Y.J.
;
Song M.-T.
;
Huang W.-J.
;
Chen X.-B.
;
Nguyen T.M.H.
;
Yang I.-S.
Ewha Authors
양인상
SCOPUS Author ID
양인상
Issue Date
2022
Journal Title
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
ISSN
1386-1425
Citation
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy vol. 280
Keywords
NiO nanoparticles
;
Phonon anisotropy
;
Raman spectra
;
Spin-phonon coupling
;
Two-dimensional correlation spectroscopy
Publisher
Elsevier B.V.
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
We report two-dimensional correlation spectroscopy (2D-COS) analyses of the Raman spectra of NiO nanoparticles over a temperature range from 100 to 300 K. 2D-Raman correlation spectra suggest strong correlation of the phonon spectral intensity variation with the magnetic ordering in NiO nanoparticles. It is revealed that the antiferromagnetic ordering affects the TO phonon anisotropy in NiO nanoparticles. We elucidate the complex spectral features of two-magnon (2 M) bands by performing appropriate 2D-COS model simulations. Significant spin-phonon coupling in NiO nanoparticles is supported by our results. High energy magnon-magnon interaction tails are also found to be involved in the spin-phonon coupling. 2D-COS analyses provide rich information regarding the nature of the phonon and magnon excitations of NiO nanoparticles. © 2022
DOI
10.1016/j.saa.2022.121498
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