2019年4月12日
Electron diffraction study of crystal structures of (Sr1−xBax)2Nb2O7
Physical Review Materials
- ,
- ,
- ,
- ,
- ,
- 巻
- 3
- 号
- 4
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/physrevmaterials.3.044405
- 出版者・発行元
- American Physical Society (APS)
Selected-area electron diffraction and convergent-beam electron diffraction (CBED) techniques are used to reveal the Ba doping effect on the crystal structure of (Sr1-xBax)(2)Nb2O7 [SBN(x)] in the temperature range from 293 to 693 K. Ba doping of Sr2Nb2O7 (SN) causes weakening of the incommensurate modulation and deviation from the C-centered lattice. On the other hand, symmetries of fundamental reflections in CBED patterns of SBN(x) are seen to be the same as those of SN, showing a small structural deviation from Cmc2(1). Crystal symmetries above and below the temperature of a relaxorlike dielectric anomaly in SBN (x = 0.32) at 465 K remain unchanged. CBED experiments with a nanometer-sized electron probe do not show any indication of the presence of a nanodomain around this temperature. However, the presence of a few-micron-sized polar-inversion domains is found at around 573 K in SBN (x = 0.32). The origin of the reported relaxorlike dielectric anomaly in SBN (x = 0.32) is discussed on the basis of the experimental results of CBED.
- リンク情報
-
- DOI
- https://doi.org/10.1103/physrevmaterials.3.044405
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000464762100001&DestApp=WOS_CPL
- URL
- https://link.aps.org/article/10.1103/PhysRevMaterials.3.044405
- URL
- http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevMaterials.3.044405/fulltext
- ID情報
-
- DOI : 10.1103/physrevmaterials.3.044405
- ISSN : 2475-9953
- eISSN : 2475-9953
- ORCIDのPut Code : 56437760
- Web of Science ID : WOS:000464762100001