Off-centering of rare-earth ion in (Ba,R)(Ti,Mg)O3 (R = Gd, Dy)

被引：4

作者：

Takeda, Shoichi ^{[1
]}

Yasuda, Satoshi ^{[1
]}

Moriyoshi, Chikako ^{[1
]}

Kuroiwa, Yoshihiro ^{[1
]}

Honda, Atsushi ^{[2
]}

Inoue, Noriyuki ^{[2
]}

Higai, Shin'ichi ^{[2
]}

Ando, Akira ^{[2
]}

机构：

[1] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

[2] Murata Mfg Co Ltd, Kyoto 6178555, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2016年 / 55卷 / 10期

关键词：

CHARGE-DENSITY; DIELECTRIC CERAMICS; OXIDES; LI; CAPACITORS; KTAO3; RADII;

D O I：

10.7567/JJAP.55.10TC08

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

To investigate the off-centering behavior of rare-earth ions that were partially substituted for A site ions in ABO(3)-type crystals, accurate crystal structure analyses of (Ba, R)(Ti, Mg)O-3 (R = Gd, Dy) were performed by high-energy synchrotron radiation X-ray powder diffraction analysis and the maximum entropy method (MEM)/Rietveld method. The R ions were observed at the six equivalent off-center sites in the < 100 > directions from the corner of a unit cell in the cubic phase. In the tetragonal phase, the R ions occupied one off-center site along the [001] direction. The R off-centering can be attributed to the covalent nature of the bond between the R and O ions in (Ba, R)(Ti, Mg)O-3 crystals. (C) 2016 The Japan Society of Applied Physics

引用

页数：5

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