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

XRD measurements proved the coexistence of spinel, lithium-rich spinel, and rock-salt phases in the Li–Mn–O system. An investigation of the electrical properties, carried out on polycrystalline samples, shows that Li2MnO3has insulating behavior while the spinel phases provide an example of hopping c...

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Bibliographic Details
Published in:Journal of solid state chemistry 1997-06, Vol.131 (1), p.94-100
Main Authors: Massarotti, V., Capsoni, D., Bini, M., Chiodelli, G., Azzoni, C.B., Mozzati, M.C., Paleari, A.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity of specific materials
Electronic transport in condensed matter
Exact sciences and technology
Insulators
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Saturation moments and magnetic susceptibilities
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Summary:XRD measurements proved the coexistence of spinel, lithium-rich spinel, and rock-salt phases in the Li–Mn–O system. An investigation of the electrical properties, carried out on polycrystalline samples, shows that Li2MnO3has 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 Mn3+over the total number of Mn3+and Mn4+sites in the spinel structure. The static magnetic susceptibility results agree with the presence of the Mn3+ions in high spin configuration.
ISSN:0022-4596
1095-726X
DOI:10.1006/jssc.1997.7349