Oxygen ion dynamics in pyrochlore-type ionic conductors: Effects of structure and ion-ion cooperativity

M. A. Frechero; O. J. Durá; M. R. Díaz-Guillén; K. J. Moreno; J. A. Díaz-Guillén; J. García-Barriocanal; A. Rivera-Calzada; A. F. Fuentes; C. León

doi:10.1016/j.jnoncrysol.2014.08.046

Oxygen ion dynamics in pyrochlore-type ionic conductors: Effects of structure and ion-ion cooperativity

M. A. Frechero, O. J. Durá, M. R. Díaz-Guillén, K. J. Moreno, J. A. Díaz-Guillén, J. García-Barriocanal, A. Rivera-Calzada, A. F. Fuentes, C. León

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Abstract

We summarize recent studies of oxide ion dynamics in ionically conducting defect pyrochlores of general formulae Ln₂Ti_{2 - y}Zr_yO₇. Unit cell volume, structural disorder, and ion-ion interactions, are all relevant in determining ion hopping probability and thus the mobility of oxide ions at high temperatures. At enough low temperatures ion hopping is scarce and oxide ion dynamics are restricted to local displacements within the cage.

Original language	English (US)
Pages (from-to)	349-354
Number of pages	6
Journal	Journal of Non-Crystalline Solids
Volume	407
DOIs	https://doi.org/10.1016/j.jnoncrysol.2014.08.046
State	Published - Jan 1 2015

Bibliographical note

Funding Information:
We acknowledge financial support by CAM (grant S2009/MAT-1756 (Phama)) and by Spanish MICINN (grants MAT2011-27470-C01 and Consolider — CSD2009-00013 (Imagine)).

Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.

Keywords

Conductivity relaxation
Electric modulus
Ionic conductivity

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Frechero, M. A., Durá, O. J., Díaz-Guillén, M. R., Moreno, K. J., Díaz-Guillén, J. A., García-Barriocanal, J., Rivera-Calzada, A., Fuentes, A. F., & León, C. (2015). Oxygen ion dynamics in pyrochlore-type ionic conductors: Effects of structure and ion-ion cooperativity. Journal of Non-Crystalline Solids, 407, 349-354. https://doi.org/10.1016/j.jnoncrysol.2014.08.046

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abstract = "We summarize recent studies of oxide ion dynamics in ionically conducting defect pyrochlores of general formulae Ln2Ti2 - yZryO7. Unit cell volume, structural disorder, and ion-ion interactions, are all relevant in determining ion hopping probability and thus the mobility of oxide ions at high temperatures. At enough low temperatures ion hopping is scarce and oxide ion dynamics are restricted to local displacements within the cage.",

keywords = "Conductivity relaxation, Electric modulus, Ionic conductivity",

author = "Frechero, {M. A.} and Dur{\'a}, {O. J.} and D{\'i}az-Guill{\'e}n, {M. R.} and Moreno, {K. J.} and D{\'i}az-Guill{\'e}n, {J. A.} and J. Garc{\'i}a-Barriocanal and A. Rivera-Calzada and Fuentes, {A. F.} and C. Le{\'o}n",

note = "Funding Information: We acknowledge financial support by CAM (grant S2009/MAT-1756 (Phama)) and by Spanish MICINN (grants MAT2011-27470-C01 and Consolider — CSD2009-00013 (Imagine)). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

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doi = "10.1016/j.jnoncrysol.2014.08.046",

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T2 - Effects of structure and ion-ion cooperativity

AU - Frechero, M. A.

AU - Durá, O. J.

AU - Díaz-Guillén, M. R.

AU - Moreno, K. J.

AU - Díaz-Guillén, J. A.

AU - García-Barriocanal, J.

AU - Rivera-Calzada, A.

AU - Fuentes, A. F.

AU - León, C.

N1 - Funding Information: We acknowledge financial support by CAM (grant S2009/MAT-1756 (Phama)) and by Spanish MICINN (grants MAT2011-27470-C01 and Consolider — CSD2009-00013 (Imagine)). Publisher Copyright: © 2014 Elsevier B.V. All rights reserved.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We summarize recent studies of oxide ion dynamics in ionically conducting defect pyrochlores of general formulae Ln2Ti2 - yZryO7. Unit cell volume, structural disorder, and ion-ion interactions, are all relevant in determining ion hopping probability and thus the mobility of oxide ions at high temperatures. At enough low temperatures ion hopping is scarce and oxide ion dynamics are restricted to local displacements within the cage.

AB - We summarize recent studies of oxide ion dynamics in ionically conducting defect pyrochlores of general formulae Ln2Ti2 - yZryO7. Unit cell volume, structural disorder, and ion-ion interactions, are all relevant in determining ion hopping probability and thus the mobility of oxide ions at high temperatures. At enough low temperatures ion hopping is scarce and oxide ion dynamics are restricted to local displacements within the cage.

KW - Conductivity relaxation

KW - Electric modulus

KW - Ionic conductivity

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ER -

Oxygen ion dynamics in pyrochlore-type ionic conductors: Effects of structure and ion-ion cooperativity

Abstract

Bibliographical note

Keywords

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