Composition-driven structural variation in ferrielectric phase of (Bi1/2Na1/2)TiO3-Ba (Mg1/3Nb2/3)O3

被引：3
|
作者：
Kitanaka, Yuuki [1 ]
Makisumi, Kohei [1 ]
Noguchi, Yuji [1 ]
Miyayama, Masaru [1 ]
Hoshikawa, Akinori [2 ]
Ishigaki, Toru [2 ]
机构：
[1] Univ Tokyo, Sch Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
[2] Ibaraki Univ, Frontier Res Ctr Appl Atom Sci, Tokai, Ibaraki 3191106, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2019年 / 58卷 / SL期
关键词：
SINGLE-CRYSTALS; POLARIZATION ROTATION; ELECTRICAL-PROPERTIES; TEMPERATURE; STRAIN;
D O I：
10.7567/1347-4065/ab37c4
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the structural variation in the ferrielectric P4bm phase of (1-x)(Bi1/2Na1/2)TiO3-xBa(Mg1/3Nb2/3)O-3 (BNT-BMN) by using high-resolution neutron powder diffraction (NPD) analysis. The NPD study on single-phase BNT-BMN powders obtained by a two-step calcination process reveals that a boundary between rhombohedral R3c and tetragonal P4bm phases exists at x = 4%. The Rietveld analysis reveals that the P4bm phase (x = 5%-10%) exhibits an isotropic expansion of the crystal lattice as well as a decrease in rotation angle of the oxygen octahedra when the BMN composition (x) increases. The compositional-driven variation in the P4bm structure strongly suggests that the polarization and octahedral rotation behaviors associated with phase transition, which is called polarization twist, has a crucial role in the enhancement of polarization properties of BNT-BMN. (C) 2019 The Japan Society of Applied Physics
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页数：5
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