Solid state Ti-47,Ti-49, Sr-87 and Ba-137 NMR characterisation of mixed barium/strontium titanate perovskites
UNSPECIFIED. (2004) Solid state Ti-47,Ti-49, Sr-87 and Ba-137 NMR characterisation of mixed barium/strontium titanate perovskites. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 26 (3-4). pp. 147-152. ISSN 0926-2040Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.ssnmr.2004.03.003
Solid state Ti-47,Ti-49, Ba-137, Sr-87 NMR spectra have been recorded on BaxSr1-xTiO3 (0 less than or equal to x less than or equal to 1) perovskite samples prepared by the powder sintering method. Multinuclear solid state NMR shows great potential for characterising such systems since the quadrupolar parameters are very sensitive to any geometric deformation around the studied nucleus. Ti-47,Ti-49 NMR powder lineshapes appear strongly influenced by the presence of even a small amount of barium (or strontium) in the coordination second sphere of the probed titanium site: substitution of strontium by barium induces the broadening of the peaks, due to quadrupolar effects, while the isotropic chemical shift increases. Ba-137 NMR spectra exhibit a distribution of the quadrupolar interaction, that could be tentatively quantified, C-Q increasing with the amount of strontium. Preliminary results were also obtained on Sr-87 NMR showing behaviour comparable to Ba-137 NMR, i.e. a broadening of the peaks due to an increasing quadrupolar interaction with the amount of barium distorting the environment of the strontium sites. (C) 2004 Elsevier Inc. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Journal or Publication Title:||SOLID STATE NUCLEAR MAGNETIC RESONANCE|
|Publisher:||ACADEMIC PRESS INC ELSEVIER SCIENCE|
|Official Date:||November 2004|
|Number of Pages:||6|
|Page Range:||pp. 147-152|
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