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dc.contributor.authorNi, W.
dc.contributor.authorYe, J.
dc.contributor.authorGuo, Y.
dc.contributor.authorCheng, C.
dc.contributor.authorLin, Z.
dc.contributor.authorLi, Y.
dc.contributor.authorWang, H.
dc.contributor.authorYu, Y.
dc.contributor.authorLi, Q.
dc.contributor.authorHuang, S.
dc.contributor.authorShao, Zongping
dc.contributor.authorWang, C.
dc.identifier.citationNi, W. and Ye, J. and Guo, Y. and Cheng, C. and Lin, Z. and Li, Y. and Wang, H. et al. 2017. Decisive role of mixed-valence structure in colossal dielectric constant of LaFeO3. Journal of the American Ceramic Society. 100 (7): pp. 3042-3049.

The role of mixed-valence structure in colossal dielectric constant (CDC) behavior has been investigated in LaFeO 3 ceramics by tuning the ratio of Fe 2+ /Fe 3+ through substituting Al for Fe. The ratio of Fe 2+ /Fe 3+ is decreased gradually from 1.0 to 0.0 by increasing the concentration of Al 3+ . Two clear-cut correlations have been found: (i) the relationship between the CDC behavior and the ratio of Fe 2+ /Fe 3+ follows an exponential function and (ii) the activation energy of the polaron relaxation is proportional to 1/? 2 0 , where ? 0 is the intrinsic dielectric constant. These findings underscore the role of the mixed-valence structure in CDC behavior and suggest that adjusting the mixed-valence structure through doping/alloying can be a promising strategy to achieve superior CDC behavior in transition-metal oxides.

dc.publisherWiley-Blackwell Publishing, Inc.
dc.titleDecisive role of mixed-valence structure in colossal dielectric constant of LaFeO3
dc.typeJournal Article
dcterms.source.titleJournal of the American Ceramic Society
curtin.departmentDepartment of Chemical Engineering
curtin.accessStatusFulltext not available

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