Pressure Induced Phase Transition in NaNbO3

被引：1

作者：

Mishra, S. K. ^{[1
]}

Mittal, R. ^{[1
]}

Chaplot, S. L. ^{[1
]}

Hansen, Thomas

机构：

[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India

来源：

SOLID STATE PHYSICS, VOL 57 | 2013年 / 1512卷

关键词：

Antiferro/Ferro; Neutron diffraction; Crystallographic aspects of phase transformations; LEAD-FREE;

D O I：

10.1063/1.4790905

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report high pressure powder neutron diffraction study in technologically important material sodium niobate using high-flux D20 neutron diffractometer at Institut Laue-Langevin, France. The measurements were carried out using Paris-Edinburgh cell upto 11 GPa in the pressure intervals of 1-2 GPa at 300 K. Rietveld refinement of the powder diffraction data revealed that diffraction patterns could be indexed using the orthorhombic structure (space group Pbcm) up to 6 GPa. Careful inspection of pressure dependence of diffraction data showed appearance and disappearance of certain superlattice reflections around 7 GPa. The new superlattice reflections that appear at 7 GPa, could be indexed by using an orthorhombic phase with space group Pbnm. We also observed that the response of the structural parameters with pressure is strongly anisotropic.

引用

页码：50 / 51

页数：2

共 50 条

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