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Neutron diffraction and total scattering for the study of solid state ionics materials

Lorenzo Malavasi 1,  Cristina Tealdi 1,  Hyunjeong Kim 2,  Thomas Proffen 2,  Simon J. Billinge 3,  Giorgio Flor 1

1. Università di Pavia, Dipartimento di Chimica Fisica, viale Taramelli 16, Pavia 27100, Italy
2. Los Alamos National Laboratory (LANL), Los Alamos, NM 87545, United States
3. Michigan State University (MSU), Chemistry Bldg, Lansing 48824, United States

Abstract
In this work we are going to present recent results on the application of neutron diffraction and neutron total scattering for the study of solid state ionics material, in particular of fast oxygen ion conductors (such as La2Mo2O9, LAMOX, and Ba2In2O5) and proton conductors oxides (barium cerates). It will be shown that in several cases the only application of neutron diffraction does not reveal all the features of these materials, particularly in the conducting phases, even though ND is a power tool in order to extract information on oxygen and proton ions within these compounds. On the other hand, pair distribution function analysis of total neutron scattering data (which takes into account both the Bragg peaks and the diffuse scattering) allow to correlate the local structure between the low-T (not conducting) and high-T (conducting) phases of a solid state ionics materials.

References:

[1] L. Malavasi, C. Ritter, G. Chiodelli, Chem. Mater. (2008) 20 2343-2351.

[2] L. Malavasi, H. Kim, S.J.L. Billinge, Th. Proffen, C. Tealdi, G. Flor, J. Am. Chem. Soc. (2007) 129 6903-6907.

[3] C. Tealdi, L. Malavasi, C. Ritter, G. Flor, G. Costa, J. Solid State Chem. (2008) 181 603-610.

 

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Presentation: Poster at 11th European Powder Diffraction Conference, Poster session, by Lorenzo Malavasi
See On-line Journal of 11th European Powder Diffraction Conference

Submitted: 2008-04-30 11:06
Revised:   2009-06-07 00:48