Raman band redshifting of α-Cu 2(OH) 3Cl with decreasing the temperature

Xiaodong Liu, Xingliang Xu, Dongdong Meng, Masayoshi Fujihala, Xuguang Zheng, Zhengwei Chen, Qixin Guo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Raman spectra of the magnetic geometric frustration material - the botallackite-structure α-Cu 2(OH) 3Cl polycrystalline sample were measured down to liquid N 2 temperature. It is found that the hydroxyl stretching bands shift abnormally according to the lattice thermal expansion effect of normal materials, i.e., they redshift with decreasing the sample temperature (negative thermal expansion) using liquid N 2 cooling while other bands blueshift. This abnormality was also confirmed by observing the band-shifting caused by local laser heating effect using different laser powers, and can be qualitatively explained by checking the local hydroxyl environment with a trimeric hydrogen bond.

Original languageEnglish
Title of host publicationFrontiers of Advanced Materials and Engineering Technology, FAMET 2012
Pages391-394
Number of pages4
DOIs
Publication statusPublished - 25 Jan 2012
Event2012 International Conference on Frontiers of Advanced Materials and Engineering Technology, FAMET 2012 - Xiamen, China
Duration: 4 Jan 20125 Jan 2012

Publication series

NameAdvanced Materials Research
Volume430-432
ISSN (Print)1022-6680

Conference

Conference2012 International Conference on Frontiers of Advanced Materials and Engineering Technology, FAMET 2012
CountryChina
CityXiamen
Period4/01/125/01/12

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Keywords

  • Local laser heating effect
  • Negative thermal expansion
  • Raman band redshifting

Cite this

Liu, X., Xu, X., Meng, D., Fujihala, M., Zheng, X., Chen, Z., & Guo, Q. (2012). Raman band redshifting of α-Cu 2(OH) 3Cl with decreasing the temperature. In Frontiers of Advanced Materials and Engineering Technology, FAMET 2012 (pp. 391-394). (Advanced Materials Research; Vol. 430-432). https://doi.org/10.4028/www.scientific.net/AMR.430-432.391