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Order–disorder Transition of Oxygen Vacancy in the Brownmillerite System by Hiroshi Yamamura; Yuichiro Yamada; Toshiyuki Mori; Tooru Atake is a Materials Science article available to read on EtoBox.

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Order-disorder transition temperature (T ) of the system (Ba Sr ) In O and Ba (In Ga ) O was investigated by d 1 2x x 2 2 5 2 12x x 2 5 21 21 means of electrical conductivity measurements and dilatometry. It was found that the substitution of Sr for Ba increased 31 31 the T , and the substitution of Ga for In decreased the T , at which the increasing rate of the electrical conductivity d d decreased. A tolerance factor, which has been used for the perovskite-type structure, was applied for the present brownmillerite systems, in order to understand the T shift. As the tolerance factor approached 1, the T decreased linearly.

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Author

Hiroshi Yamamura; Yuichiro Yamada; Toshiyuki Mori; Tooru Atake

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-2738)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)