Cooperative oxygen ion dynamics inGd2Ti2−yZryO7 | Zendy

Karla J. Moreno | Zendy; G. Mendoza-Suárez | Zendy; Antonio F. Fuentes | Zendy; Javier GarcíaBarriocanal | Zendy; C. León | Zendy; J. Santamarı́a | Zendy

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Cooperative oxygen ion dynamics inGd2Ti2−yZryO7

Author(s) -

Karla J. Moreno,

G. Mendoza-Suárez,

Antonio F. Fuentes,

Javier GarcíaBarriocanal,

C. León,

J. Santamarı́a

Publication year - 2005

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.71.132301

Subject(s) - oxygen , ion , energy (signal processing) , activation energy , diffusion , materials science , range (aeronautics) , analytical chemistry (journal) , physics , chemistry , thermodynamics , chromatography , quantum mechanics , composite material

We report on dispersive conductivity measurements in the oxygen ion conductor Gd_(2)(Ti_(2−y)Zr_(y))O_(7). Increasing Zr content leads to higher concentration of oxygen vacancies and results in higher activation energies for long-range ion transport, whilst the microscopic energy barrier for single ion hopping remains constant. We find evidence that, besides oxygen binding energy, enhanced cooperativity in oxygen ion dynamics determines the activation energy for long-range diffusion

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