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Electric and Magnetic Properties of LiMn2O4- and Li2MnO3-Type Oxides

✍ Scribed by V. Massarotti; D. Capsoni; M. Bini; G. Chiodelli; C.B. Azzoni; M.C. Mozzati; A. Paleari

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
309 KB
Volume
131
Category
Article
ISSN
0022-4596

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✦ Synopsis

XRD measurements proved the coexistence of spinel, lithiumrich spinel, and rock-salt phases in the Li-Mn-O system. An investigation of the electrical properties, carried out on polycrystalline samples, shows that Li 2 MnO 3 has insulating behavior while the spinel phases provide an example of hopping conduction mechanism. The negative Seebeck coefficient suggests that electrons constitute the charge carriers and their number is consistent with the fraction of Mn 3Ψ‰ over the total number of Mn 3Ψ‰ and Mn 4Ψ‰ sites in the spinel structure. The static magnetic susceptibility results agree with the presence of the Mn 3Ψ‰ ions in high spin configuration.

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