2D correlation analysis of the magnetic excitations in Raman spectra of HoMnO3

Thi Huyen Nguyen, Thi Minh Hien Nguyen, Xiang Bai Chen, In Sang Yang, Yeonju Park, Young Mee Jung

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

2D correlation analysis is performed on the temperature-dependent Raman spectra of HoMnO3 thin films. As the temperature of the HoMnO 3 thin films decrease, the depletion of the spectral weight at 336, 656, and 1304 cm-1 occurs at higher temperatures than the increase of the intensity at 508, 766, and 945 cm-1 below ∼70 K, the Néel temperature. The power spectrum asserts that all the changes in the spectral weight are strongly correlated. Most of the temperature-induced spectral changes of HoMnO3 occur at lower temperature than 70 K, while there is slight depletion of the spectral weight at 336, 656, and 1304 cm-1 even at higher temperature than 70 K. PCA scores and loading vectors plots also support these 2D correlation results. Our 2D correlation analysis supports the existence of the short range spin correlations between Mn sites in HoMnO3 even above the Néel temperature.

Original languageEnglish
Pages (from-to)280-283
Number of pages4
JournalJournal of Molecular Structure
Volume1069
Issue number1
DOIs
StatePublished - 8 Jul 2014

Keywords

  • 2D correlation spectroscopy
  • Néel temperature
  • Principal component analysis
  • Raman spectroscopy
  • Short-range spin correlation

Fingerprint

Dive into the research topics of '2D correlation analysis of the magnetic excitations in Raman spectra of HoMnO3'. Together they form a unique fingerprint.

Cite this