Phase transition and huge ferroelectric polarization observed in BiFe1−xGaxO3 thin films

We prepared the chemical-solution deposited films of BiFe1−xGaxO3, which was previously only possibly synthesized under high-pressure and high-temperature. The thin films crystallized in rhombohedral perovskite structure (R3c) up to x = 0.05 and in tetragonal-like monoclinic structure (Cm) above x =...

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Bibliographic Details
Published in:Applied physics letters 2013-06, Vol.102 (22)
Main Authors: Yan, Jingdan, Gomi, Manabu, Yokota, Takeshi, Song, Huaihe
Format: Article
Language:English
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Summary:We prepared the chemical-solution deposited films of BiFe1−xGaxO3, which was previously only possibly synthesized under high-pressure and high-temperature. The thin films crystallized in rhombohedral perovskite structure (R3c) up to x = 0.05 and in tetragonal-like monoclinic structure (Cm) above x = 0.2. The coexistence of R3c and Cm phases was observed at x = 0.1. It is found that Bi-based film with coexistence phase exhibits a huge ferroelectric polarization of 230 μC cm−2, which can be attributed to the presence of the morphotropic phase boundary.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4809955