Crystallographic superstructure of Ti-doped hexagonalYMnO3
Crystallographic superstructure of Ti-doped hexagonalYMnO3
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DOI：
10.1103/physrevb.71.014114
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发表时间：
2005-01
影响因子：
3.7
通讯作者：
T. Asaka;K. Nemoto;K. Kimoto;T. Arima;Y. Matsui
中科院分区：
文献类型：
--
作者：
T. Asaka;K. Nemoto;K. Kimoto;T. Arima;Y. Matsui
合成了六方结构的Ti掺杂YMnO{sub 3}，并利用透射电子显微镜对其晶体结构进行了研究。Ti掺杂的YMnO{sub 3}出现调制波矢为q=（1/3）c{sup *}的超晶格反射斑点。我们发现Ti掺杂的YMnO{sub 3}本质上是由六方相和菱形相组成的，这是由于形成了沿c轴沿着具有3d{sub 001}周期的超结构。从六方到菱形的相变是由于Mn（Ti）O层中Mn（Ti）三聚体堆积方式的改变。
We synthesized hexagonal YMnO{sub 3} doped with Ti ions and investigated the crystal structure by means of transmission electron microscopy. Superlattice reflection spots with a modulation wave vector q=(1/3)c{sup *} appeared for the Ti-doped YMnO{sub 3}. We found that Ti-doped YMnO{sub 3} intrinsically consists of the hexagonal phase and the rhombohedral phase derived from formation of a superstructure with the 3d{sub 001} period along the c axis. The hexagonal-to-rhombohedral phase transition results from a change of the stacking manner in Mn(Ti) trimers in Mn(Ti)O layers.