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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 8 — Aug. 1, 2012
  • pp: 083001–

Raman spectroscopy study of in situ change in laser irradiated LiMn2O4

Zhaojun Liu, Ligang Han, and Yujun Mo  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 8, pp. 083001- (2012)


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Abstract

A spinel LiMn<sub>2</sub>O<sub>4</sub> is investigated via Raman spectroscopy at 514.5-nm excitation and X-ray diffraction. The dependence of Raman spectra on the different irradiated laser powers is determined and found to be different from that at 632.8-nm excitation. Based on our extensive analysis, our experimental results can be attributed to the laser heating effect, which reduces the Mn<sup>4+</sup> cation concentration in the local area. Consequently, the decrease in average Mn valence in the local area unavoidably induces the Jahn-Teller effect and local lattice distortion, which accounts for the evolution of the measured Raman spectra of spinel LiMn<sub>2</sub>O<sub>4</sub>.

© 2012 Chinese Optics Letters

OCIS Codes
(290.5860) Scattering : Scattering, Raman
(300.6450) Spectroscopy : Spectroscopy, Raman

ToC Category:
Spectroscopy

Citation
Zhaojun Liu, Ligang Han, and Yujun Mo, "Raman spectroscopy study of in situ change in laser irradiated LiMn2O4," Chin. Opt. Lett. 10, 083001- (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-8-083001


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