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Issue 19, 2004
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Evolution of structure, transport properties and magnetism in ternary lithium nitridometalates Li3−xyMxN, M = Co, Ni, Cu

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Abstract

The structures, magnetism and ion transport properties of the ternary nitrides Li3−xyMxN (M = Co, Ni, Cu; y = lithium vacancy) were examined by powder X-ray diffraction, solid-state NMR and SQUID magnetometry. Doping levels are achieved up to x ≈ 0.4 for M = Cu and Co, but much higher substitution levels (x ≈ 1) are obtained in the Li–Ni–N system. Transition metals substitute for Li at the Li(1) interplanar site and the ensuing lithium vacancies are disordered within the [Li2N] planes. High substitution levels in the Li–Ni–N system lead to the formation of ordered phases. Diffusion parameters, including activation energies, correlation times and diffusion coefficients, were obtained from variable-temperature solid-state NMR measurements in several ternary compounds. SQUID magnetometry shows significant variations of the electronic properties with dopant and x. The properties of the ternary nitrides can be rationalised in terms of the identity of the dopant and the structural modifications arising from the substitution process.

Graphical abstract: Evolution of structure, transport properties and magnetism in ternary lithium nitridometalates Li3−x−yMxN, M = Co, Ni, Cu

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Article information


Submitted
27 Jan 2004
Accepted
30 Mar 2004
First published
23 Jul 2004

Dalton Trans., 2004, 3093-3097
Article type
Paper

Evolution of structure, transport properties and magnetism in ternary lithium nitridometalates Li3−xyMxN, M = Co, Ni, Cu

Z. Stoeva, R. Gomez, D. H. Gregory, G. B. Hix and J. J. Titman, Dalton Trans., 2004, 3093
DOI: 10.1039/B401272K

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