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Magnetism and structural chemistry of the n=2 Ruddlesden–Popper phase La3LiMnO7

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Bibliographic Details
Title:	Magnetism and structural chemistry of the n=2 Ruddlesden–Popper phase La3LiMnO7
Authors:	Battle, Peter D.¹ peter.battle@chem.ox.ac.uk, Burley, Jonathan C.², Gallon, Daniel J.¹, Grey, Clare P.³, Sloan, Jeremy¹
Source:	Journal of Solid State Chemistry. Jan2004, Vol. 177 Issue 1, p119. 7p.
Subjects:	Polycrystals, X-ray diffraction, Neutron diffraction, Lithium
Abstract:	Polycrystalline samples of the n=2 Ruddlesden–Popper phase La3LiMnO7 have been prepared and characterized. X-ray and neutron diffraction suggest that the structure is tetragonal with a disordered distribution of Li and Mn cations over the octahedral sites, but 6Li MAS NMR shows that the Li and Mn are 1:1 ordered locally. Electron microscopy shows that the stacking of the cation-ordered, perovskite-like bilayers along the crystallographic z-axis is disordered on the distance scale sampled by X-ray and neutron diffraction. Magnetometry data and neutron diffraction data collected at 2 K together suggest that the Mn cations within each structural domain order antiferromagnetically at 14 K, but that the disorder along z prevents the establishment of long-range magnetic order. [Copyright &y& Elsevier]
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Database:	Engineering Source

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