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Local Structure and Magnetic Properties of LixFePO4 Glasses

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Abstract

A series of LixFePO4 samples (0=x=1) have been synthesized in the vitreous state by fast quenching technique. Characterization methods include XRD, TG, FTIR, magnetic susceptibility and electrical measurements. FTIR studies reveal that in the entire composition range the local structure is identical to the olivine lattice including PO4 3- oxo-anions linked to FeO6 octahedra. Magnetic susceptibility data show that the antiferromagnetic ordering does not exist so far and the paramagnetic behaviour follows the Curie-Weiss law above 30 K. Both the Curie parameter and the Weiss temperature suggest a strong weakness of the superexchange interactions that are consistent with the analysis of infrared spectra. Electrical conductivity shows an activated conduction mechanism with Ea =0.67 eV.

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Jozwiak, P., Garbarczyk, J., Gendron, F. et al. Local Structure and Magnetic Properties of LixFePO4 Glasses. MRS Online Proceedings Library 972, 615 (2006). https://doi.org/10.1557/PROC-0972-AA06-15

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  • DOI: https://doi.org/10.1557/PROC-0972-AA06-15

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