Phase transitions and thermotropic phase boundaries in MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals: Raman scattering evidence at elevated temperatures

L. P. Xu; K. Jiang; J. Z. Zhang; G. S. Xu; Z. G. Hu; J. H. Chu

doi:10.1063/1.4916226

Phase transitions and thermotropic phase boundaries in MnO₂-doped (K_0.5Na_0.5)NbO₃-0.05LiNbO₃ single crystals: Raman scattering evidence at elevated temperatures

L. P. Xu
, K. Jiang
, J. Z. Zhang
, G. S. Xu
, Z. G. Hu^*
, J. H. Chu

^*此作品的通讯作者

物理与电子科学学院

East China Normal University
CAS - Shanghai Institute of Technical Physics
CAS - Shanghai Institute of Ceramics

科研成果: 期刊稿件 › 文章 › 同行评审

19 引用（Scopus）

摘要

Raman scattering of (K_0.5Na_0.5)NbO₃-0.05LiNbO₃-yMnO₂ (y = 0% and 1.0%) single crystals have been reported in the temperature range from 300 to 800 K. The spectra exhibit a competition between a soft mode and a relaxation mode upon heating across the diverse transitions. The progressive change in the conflicting displacive mechanism (soft mode) and order-disorder (relaxation mode) can explain the origin of the successive orthorhombic-tetragonal-cubic phase transitions. Moreover, the polymorphic phase transition between orthorhombic and tetragonal structures can be confirmed through the observation of thermotropic phase boundaries for MnO₂-doped (K_0.5Na_0.5)NbO₃-0.05LiNbO₃ single crystals.

源语言	英语
文章编号	122901
期刊	Applied Physics Letters
卷	106
期	12
DOI	https://doi.org/10.1063/1.4916226
出版状态	已出版 - 23 3月 2015

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title = "Phase transitions and thermotropic phase boundaries in MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals: Raman scattering evidence at elevated temperatures",

abstract = "Raman scattering of (K0.5Na0.5)NbO3-0.05LiNbO3-yMnO2 (y = 0\% and 1.0\%) single crystals have been reported in the temperature range from 300 to 800 K. The spectra exhibit a competition between a soft mode and a relaxation mode upon heating across the diverse transitions. The progressive change in the conflicting displacive mechanism (soft mode) and order-disorder (relaxation mode) can explain the origin of the successive orthorhombic-tetragonal-cubic phase transitions. Moreover, the polymorphic phase transition between orthorhombic and tetragonal structures can be confirmed through the observation of thermotropic phase boundaries for MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals.",

author = "Xu, \{L. P.\} and K. Jiang and Zhang, \{J. Z.\} and Xu, \{G. S.\} and Hu, \{Z. G.\} and Chu, \{J. H.\}",

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month = mar,

day = "23",

doi = "10.1063/1.4916226",

language = "英语",

volume = "106",

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TY - JOUR

T1 - Phase transitions and thermotropic phase boundaries in MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals

T2 - Raman scattering evidence at elevated temperatures

AU - Xu, L. P.

AU - Jiang, K.

AU - Zhang, J. Z.

AU - Xu, G. S.

AU - Hu, Z. G.

AU - Chu, J. H.

PY - 2015/3/23

Y1 - 2015/3/23

N2 - Raman scattering of (K0.5Na0.5)NbO3-0.05LiNbO3-yMnO2 (y = 0% and 1.0%) single crystals have been reported in the temperature range from 300 to 800 K. The spectra exhibit a competition between a soft mode and a relaxation mode upon heating across the diverse transitions. The progressive change in the conflicting displacive mechanism (soft mode) and order-disorder (relaxation mode) can explain the origin of the successive orthorhombic-tetragonal-cubic phase transitions. Moreover, the polymorphic phase transition between orthorhombic and tetragonal structures can be confirmed through the observation of thermotropic phase boundaries for MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals.

AB - Raman scattering of (K0.5Na0.5)NbO3-0.05LiNbO3-yMnO2 (y = 0% and 1.0%) single crystals have been reported in the temperature range from 300 to 800 K. The spectra exhibit a competition between a soft mode and a relaxation mode upon heating across the diverse transitions. The progressive change in the conflicting displacive mechanism (soft mode) and order-disorder (relaxation mode) can explain the origin of the successive orthorhombic-tetragonal-cubic phase transitions. Moreover, the polymorphic phase transition between orthorhombic and tetragonal structures can be confirmed through the observation of thermotropic phase boundaries for MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals.

UR - https://www.scopus.com/pages/publications/84925823323

U2 - 10.1063/1.4916226

DO - 10.1063/1.4916226

M3 - 文章

AN - SCOPUS:84925823323

SN - 0003-6951

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 12

M1 - 122901

ER -

Phase transitions and thermotropic phase boundaries in MnO2-doped (K0.5Na0.5)NbO3-0.05LiNbO3 single crystals: Raman scattering evidence at elevated temperatures

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Phase transitions and thermotropic phase boundaries in MnO₂-doped (K_0.5Na_0.5)NbO₃-0.05LiNbO₃ single crystals: Raman scattering evidence at elevated temperatures