検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

リラクサー強誘電体Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$の局所構造解析

Local structure analysis of relaxor ferroelectrics Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$

米田 安宏   ; 谷口 博基*; 野口 祐二*

Yoneda, Yasuhiro; Taniguchi, Hiroki*; Noguchi, Yuji*

リラクサー強誘電体Pb(Mg$$_{1/3}$$Nb$$_{2/3})$$O$$_3$$は構造モデルが多く提案されている。我々は平均構造から得られるPb-Oの距離とX線吸収微細構造(XAFS)で得られるPb-Oの距離が異なることを示した。平均構造と局所構造のずれはPb原子の特徴的な環境に由来すると考えられることから、パイロクロア型のPb$$_2$$Sn$$_2$$O$$_6$$におけるPb原子と同様の振る舞いを仮定し、局所構造モデリングを試みた。2体相関分布関数(pair-distribution function: PDF)解析を行い、局所構造モデリングの結果、格子系の周期性とは異なるPb原子のネットワーク構造の存在が示唆された。

Many structural models have been proposed for relaxer ferroelectrics Pb(Mg$$_{1/3}$$Nb$$_{2/3})$$O$$_3$$. We have shown that the Pb-O distance obtained from the mean structure differs from the Pb-O distance obtained from the X-ray absorption fine structure (XAFS). Since the deviation between the average structure and the local structure is considered to be derived from the characteristic environment of the Pb atom, the behavior similar to that of the Pb atom in the pyrochlore type Pb$$_2$$ Sn$$_2$$O$$_6$$ is assumed and the local structure is assumed. I tried structural modeling. A pair-distribution function (PDF) analysis was performed, and as a result of local structure modeling, it was suggested that there is a network structure of Pb atoms that is different from the periodicity of the lattice system.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.