FEATURES OF THE INCOMMENSURATE STRUCTURE IN BARIUM-SODIUM-NIOBATE

被引：3

作者：

Mori, S. ^{[1
]}

Koyama, Y. ^{[1
]}

Uesu, Y. ^{[2
]}

机构：

[1] Waseda Univ, Dept Mat Sci & Engn, Shinjuku Ku, Tokyo 169, Japan

[2] Waseda Univ, Dept Phys, Shinjuku Ku, Tokyo 169, Japan

来源：

FERROELECTRICS | 1994年 / 155卷

关键词：

D O I：

10.1080/00150199408007522

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Features of a tetragonal-to-incommensurate transition in Barium-Sodium-Niobate, which is obtained in a cooling process, were examined both experimentally and theoretically. In-situ observation of the transition by means of transmission electron microscopy shows that on cooling from the tetragonal phase a characteristic mazy pattern appears in satellite dark field image just below the tetragonal-to-incommensurate transition. On further cooling to room temperature, the mazy pattern is continuously changed into a pattern showing a black line contrast due to a discommensuration. In addition, the details of a phase modulation in the incommensurate structure are discussed on the basis of the Ginzburg-Landau theory.

引用

页码：293 / 298

页数：6

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