Effect of NaNbO3 substitution on the quantum paraelectric behavior of CaTiO3

被引：2

作者：

Tripathi, Saurabh ^{[1
]}

Kumar, Anil ^{[2
]}

Waghmare, Umesh V. ^{[2
]}

Pandey, Dhananjai ^{[1
]}

机构：

[1] Banaras Hindu Univ, Sch Mat Sci & Technol, Varanasi 221005, Uttar Pradesh, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, Theoret Sci Unit, Bangalore 560064, Karnataka, India

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 21期

关键词：

SOFT PHONON MODES; FERROELECTRICITY; TRANSITION;

D O I：

10.1103/PhysRevB.81.212101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Low-temperature dielectric and x-ray diffraction studies on NaNbO3 substituted CaTiO3 reveals suppression of quantum fluctuations, when the concentration of NaNbO3 exceeds 2%. Group-subgroup considerations in conjunction with the knowledge of unstable phonon modes, obtained by first-principles calculations, show that the low-temperature phase is a unique type of ferrielectric phase that exhibits planar antiferroelectric and axial ferroelectric orders.

引用

页数：4

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