Relation between Fractal Inhomogeneity and In/Nb-Arrangement in Pb(In1/2Nb1/2)O3
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<jats:title>Abstract</jats:title><jats:p>Relaxor ferroelectrics show substantial responses to electric fields. The key difference from normal ferroelectrics is a temperature-dependent inhomogeneous structure and its dynamics. The lead-based complex perovskite Pb(In<jats:sub>1/2</jats:sub>Nb<jats:sub>1/2</jats:sub>)O<jats:sub>3</jats:sub>is an intriguing system in which the inhomogeneous structure can be controlled by thermal treatment. Herein, we report investigations of the phase transitions in single crystals of Pb(In<jats:sub>1/2</jats:sub>Nb<jats:sub>1/2</jats:sub>)O<jats:sub>3</jats:sub>via changing the degree of randomness in which In and Nb occupy the B site of the ABO<jats:sub>3</jats:sub>perovskite structure. We studied the dynamic properties of the structure using inelastic light scattering and the static properties using diffuse X-ray scattering. These properties depend on the degree of randomness with which the B site is occupied. When the distribution of occupied In/Nb sites is regular, the antiferroelectric phase is stabilised by a change in the collective transverse-acoustic wave, which suppresses long-range ferroelectric order and the growth of the inhomogeneous structure. However, when the B site is occupied randomly, a fractal structure grows as the temperature decreases below<jats:italic>T</jats:italic><jats:sup>*</jats:sup>~475 K, and nanosized ferroelectric domains are produced by the percolation of self-similar and static polar nanoregions.</jats:p>
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- Scientific Reports
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Scientific Reports 7 17508-, 2017-12
Nature Publishing Group
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詳細情報 詳細情報について
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- CRID
- 1050282677597117568
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- NII論文ID
- 120007134601
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- ISSN
- 20452322
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- HANDLE
- 2241/00150671
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- 本文言語コード
- en
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- 資料種別
- journal article
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