2005年1月
Structural phase transitions and dielectric anomaly in YFe2O4-delta
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
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- ,
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- 巻
- 46
- 号
- 1
- 開始ページ
- 192
- 終了ページ
- 194
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- KOREAN PHYSICAL SOC
We examined structural changes related to charge ordering (CO) in the temperature window between 100 K and room temperature (BT) in YFe2O4-delta by transmission electron microscopy. Characteristic diffuse scattering elongated along the [001] direction through the (1/3 1/3 0)-type reciprocal positions was found at RT, which is related to the microdomains due to the CO with a size of 10 - 20 run. In addition, it was also found that the superlattice structures characterized by the (1/3 - eta1/3 + eta0)-type modulation vector, which should be due to the vacancy ordering, coexist with the microdomains due to the CO. On the other hand, in stoichimetric YFe2O4, We found temperature variations of the superlattice structures on warming from 100 K, which should be strongly related to the dielectric anomalies in YFe2O4.
- リンク情報
- ID情報
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- ISSN : 0374-4884
- Web of Science ID : WOS:000226362500049