Investigation of the Cr:LiSrAlF6 crystal by high-temperature Raman spectroscopy

doi:10.1088/1674-1056/20/10/108101

Abstract In this paper, Cr-doped LiSrAlF₆ crystals are investigated using high-temperature Raman spectroscopy and the single-crystal Raman spectra of Cr:LiSrAlF₆ are analysed by factor group theory and comparison with other fluorides. The results indicate that Cr:LiSrAlF₆ is stable below its melting point; Raman peaks located at 561, 322 and 250 cm^-1 are assigned to the A_1g modes of AlF₆, SrF₆ and LiF₆ octachdra, respectively; with temperature increasing, Raman peaks associated with AlF₆ octahedra shift towards low frequencies, while LiF₆ and SrF₆ octahedra are temperature-insensitive; around the crystal melting point, three new Raman peaks occur, which are associated with the AlF₆ octahedral chain structure. Finally, the microstructural evolution of Cr:LiSrAlF₆ from room temperature to its melting point is discussed based on its Raman spectra.

Keywords: Cr:LiSrAlF₆ crystal high-temperature Raman spectroscopy crystal structure in situ investigation

Received: 17 January 2011
Revised: 27 May 2011
Accepted manuscript online:

PACS:	81.10.-h	(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
	36.20.Ng	(Vibrational and rotational structure, infrared and Raman spectra)
	42.70.Hj	(Laser materials)

Fund: Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 50932005) and the Open Poject of Shanghai Key Laboratory of Modern Metallurgy and Materials Processing (Grant No. SELF-2009-01).

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Wang Di(王迪), Wan Song-Ming(万松明), Zhang Qing-Li(张庆礼), Sun Dun-Lu(孙敦陆), Gu Gui-Xin(顾桂新), Yin Shao-Tang(殷绍唐) Zhang Guo-Chun(张国春), You Jing-Lin(尤静林), and Wang Yuan-Yuan(王媛媛) Investigation of the Cr:LiSrAlF₆ crystal by high-temperature Raman spectroscopy 2011 Chin. Phys. B 20 108101

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Investigation of the Cr:LiSrAlF6 crystal by high-temperature Raman spectroscopy

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Investigation of the Cr:LiSrAlF₆ crystal by high-temperature Raman spectroscopy