Growth and characterization of nonlinear optical telluromolybdate CoTeMoO{sub 6} single crystals

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2014.08.023· OSTI ID:22451122

Mączka, Mirosław ^[1]; Hermanowicz, Krzysztof ^[1]; Majchrowski, Andrzej ^[2]; Kroenke, Łukasz ^[3]; Pietraszko, Adam; Ptak, Maciej ^[1]

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1. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław 2 (Poland)
2. Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw (Poland)
3. Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warsaw (Poland)

Nonlinear optical (NLO) crystals CoTeMoO{sub 6} have been grown from high temperature solution by means of spontaneous crystallization. These crystals have been characterized by temperature-dependent X-ray diffraction, infrared and electron absorption methods. Moreover, polarized Raman spectra have been measured at room temperature. These studies showed that the Mo{sup 6+} and Te{sup 4+} ions are in asymmetric coordination environment, and CoTeMoO{sub 6} has the largest flexibility index among MTeMoO{sub 6} family of telluro-molybdates (M=Zn, Mg, Cd, Mn, Co), making this compound attractive NLO material. Raman and IR studies allowed assigning the observed modes to respective motions of atoms in the unit cell. They have also showed evidence for spin–phonon coupling at low temperatures and suggested that CoTeMoO{sub 6} is prospective material for solid-state Raman laser-frequency converters. Analysis of electron absorption data has shown that Co{sup 2+} ions are located in sites of weak crystal field with the crystal field parameters Dq and B equal to 548 cm{sup −1} and 882 cm{sup −1}, respectively. - Graphical abstract: View of CoTeMoO{sub 6} crystal structure along the b-axis. - Highlights: • Single crystals of nonlinear optical telluromolybdate CoTeMoO{sub 6} were grown. • Crystal structure was solved by means of single crystal X-ray diffraction. • Raman and IR spectra were measured and analyzed. • Crystal field strength acting on Co{sup 2+} ions was established from analysis of electron absorption spectra.

• OSTI ID: 22451122
• Journal Information: Journal of Solid State Chemistry, Vol. 220; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION
ABSORPTION SPECTRA
COBALT IONS
CRYSTAL FIELD
CRYSTAL STRUCTURE
CRYSTALLIZATION
ELECTRONS
FLEXIBILITY
FREQUENCY CONVERTERS
INFRARED SPECTRA
MOLYBDATES
MOLYBDENUM IONS
MONOCRYSTALS
PHONONS
RAMAN SPECTRA
SOLIDS
SPIN
TELLURIUM IONS
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION