• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利：CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法，用中文像聊天一样搜索，搜遍4000万医学文献。AI智能推荐，让科研检索更轻松。

立即免费搜索

文件翻译

保留排版，准确专业，支持PDF/Word/PPT等文件格式，支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述，25分钟生成高质量综述，智能提取关键信息，辅助科研写作。

立即免费体验

硬柱石在其相变附近晶格动力学的异常特征。

Unusual features of lattice dynamics in lawsonite near its phase transitions.

作者信息

Kadlec Filip, Nuzhnyy Dmitry, Kadlec Christelle, Petzelt Jan, Savinov Maxim, Kamba Stanislav

机构信息

Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21, Prague 8, Czech Republic.

出版信息

Sci Rep. 2022 Apr 13;12(1):6157. doi: 10.1038/s41598-022-09890-7.

DOI:10.1038/s41598-022-09890-7
PMID:35418697
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9008026/
Abstract

Lattice dynamics of a single crystal of lawsonite were studied over a broad range of frequencies (1 Hz to 20 THz) using impedance, THz time-domain and infrared spectroscopies. Based on polarized spectra of complex permittivity [Formula: see text] measured as a function of temperature between 10 K and 500 K, we analyzed the properties of the two known phase transitions-an antiferrodistortive one near [Formula: see text] and a ferroelectric one, occurring at [Formula: see text]. The former one is accompanied by a flat maximum in the THz-range permittivity [Formula: see text] near [Formula: see text], which is due to an overdamped polar excitation in the [Formula: see text] spectra reflecting the dynamics of water and hydroxyl groups. The strength of this mode decreases on cooling below [Formula: see text], and the mode vanishes below [Formula: see text] due to hydrogen ordering. At the pseudoproper ferroelectric phase transition, two independent anomalies in permittivity were observed. First, [Formula: see text] exhibits a peak at [Formula: see text] due to critical slowing down of a relaxation in the GHz range. Second, infrared and THz spectra revealed an optical phonon softening towards [Formula: see text] which causes a smaller but pronounced maximum in [Formula: see text]. Such anomaly, consisting in a soft mode polarized perpendicularly to the ferroelectric axis, is unusual in ferroelectrics.

摘要

利用阻抗、太赫兹时域和红外光谱技术，在很宽的频率范围（1赫兹至20太赫兹）内研究了硬柱石单晶的晶格动力学。基于在10K至500K温度范围内测量的复介电常数[公式：见原文]的偏振光谱，我们分析了两个已知相变的性质——一个在[公式：见原文]附近的反铁电畸变相变和一个在[公式：见原文]发生的铁电相变。前者在太赫兹范围介电常数[公式：见原文]中，在[公式：见原文]附近伴随着一个平坦的最大值，这是由于在[公式：见原文]光谱中一个过阻尼的极性激发，反映了水和羟基的动力学。低于[公式：见原文]冷却时，这种模式的强度降低，并且由于氢有序化，该模式在低于[公式：见原文]时消失。在准固有铁电相变时，观察到介电常数有两个独立的异常。首先，[公式：见原文]由于GHz范围内弛豫的临界减慢在[公式：见原文]处出现一个峰值。其次，红外和太赫兹光谱显示，朝向[公式：见原文]光学声子软化，这在[公式：见原文]中导致一个较小但明显的最大值。这种异常表现为一个垂直于铁电轴偏振的软模，在铁电体中是不常见的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/93bbfc7fc726/41598_2022_9890_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/1c66037d19cb/41598_2022_9890_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/4a89abf3d42f/41598_2022_9890_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/06a1566fcc8b/41598_2022_9890_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/3f4dd728bc5c/41598_2022_9890_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/89418123a381/41598_2022_9890_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/93bbfc7fc726/41598_2022_9890_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/1c66037d19cb/41598_2022_9890_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/4a89abf3d42f/41598_2022_9890_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/06a1566fcc8b/41598_2022_9890_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/3f4dd728bc5c/41598_2022_9890_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/89418123a381/41598_2022_9890_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c11/9008026/93bbfc7fc726/41598_2022_9890_Fig6_HTML.jpg

相似文献

1
Unusual features of lattice dynamics in lawsonite near its phase transitions.硬柱石在其相变附近晶格动力学的异常特征。
Sci Rep. 2022 Apr 13;12(1):6157. doi: 10.1038/s41598-022-09890-7.
2
Spectroscopic studies of the ferroelectric and magnetic phase transitions in multiferroic Sr1-xBaxMnO3.多铁性材料Sr1-xBaxMnO3中铁电和磁相变的光谱研究
J Phys Condens Matter. 2016 May 5;28(17):175901. doi: 10.1088/0953-8984/28/17/175901. Epub 2016 Mar 29.
3
Phase transitions and lattice dynamics in perovskite-type hydride [Formula: see text].钙钛矿型氢化物[化学式：见原文]中的相变和晶格动力学。
J Phys Condens Matter. 2019 Dec 18;31(50):505402. doi: 10.1088/1361-648X/ab3cfe.
4
Investigation of new magnetoelastic and magnetic transitions accompanied with magnetoelectric coupling in [Formula: see text] multiferroic.对[化学式：见原文]多铁性材料中伴随磁电耦合的新型磁弹性和磁转变的研究。
J Phys Condens Matter. 2020 Mar 6;32(10):105401. doi: 10.1088/1361-648X/ab5765. Epub 2019 Nov 13.
5
Structural phase transitions in malononitrile, CH(CN): crystal structure of the δ phase by neutron powder diffraction, and ab initio calculations of the structures and phonons of the α and δ phases.丙二腈（CH(CN)₂）中的结构相变：通过中子粉末衍射确定δ相的晶体结构，以及α相和δ相结构与声子的从头算计算
J Phys Condens Matter. 2019 Jun 26;31(25):255401. doi: 10.1088/1361-648X/ab11a1. Epub 2019 Mar 20.
6
Soft and central mode behaviour in PbMg(1/3)Nb(2/3)O(3) relaxor ferroelectric.PbMg(1/3)Nb(2/3)O(3)弛豫铁电体中的软模和中心模行为
J Phys Condens Matter. 2005 Jun 29;17(25):3965-74. doi: 10.1088/0953-8984/17/25/022. Epub 2005 Jun 10.
7
Local ferroelectric polarization switching driven by nanoscale distortions in thermoelectric [Formula: see text].由热电[公式：见原文]中的纳米级畸变驱动的局部铁电极化切换。
Sci Rep. 2021 Aug 25;11(1):17190. doi: 10.1038/s41598-021-96299-3.
8
Fast polarization mechanisms in the uniaxial tungsten-bronze relaxor strontium barium niobate SBN-81.单轴钨青铜型弛豫铁电体铌酸锶钡SBN-81中的快速极化机制
Sci Rep. 2017 Dec 21;7(1):18034. doi: 10.1038/s41598-017-18252-7.
9
Temperature-dependent optical constants of monolayer , , , and : spectroscopic ellipsometry and first-principles calculations.单层、、、和的温度相关光学常数：椭偏光谱法和第一性原理计算
Sci Rep. 2020 Sep 17;10(1):15282. doi: 10.1038/s41598-020-71808-y.
10
Dielectric, magnetic and structural properties of novel multiferroic Eu(0.5)Ba(0.5)TiO(3) ceramics.新型多铁性 Eu(0.5)Ba(0.5)TiO(3)陶瓷的介电、磁和结构性能。
J Phys Condens Matter. 2011 Jan 19;23(2):025904. doi: 10.1088/0953-8984/23/2/025904. Epub 2010 Dec 16.

本文引用的文献

1
Ferroelastic-switching-driven large shear strain and piezoelectricity in a hybrid ferroelectric.混合铁电体中由铁弹性开关驱动的大剪切应变和压电性
Nat Mater. 2021 May;20(5):612-617. doi: 10.1038/s41563-020-00875-3. Epub 2021 Jan 11.
2
Dielectric ordering of water molecules arranged in a dipolar lattice.在偶极晶格中排列的水分子的介电有序。
Nat Commun. 2020 Aug 6;11(1):3927. doi: 10.1038/s41467-020-17832-y.
3
Incipient ferroelectricity of water molecules confined to nano-channels of beryl.局限于绿柱石纳米通道内水分子的初始铁电性
Nat Commun. 2016 Sep 30;7:12842. doi: 10.1038/ncomms12842.
4
Supramolecular ferroelectrics.超分子铁电体
Nat Chem. 2015 Apr;7(4):281-94. doi: 10.1038/nchem.2206.
5
Rochelle salt - a structural reinvestigation with improved tools. I. The high-temperature para-electric phase at 308 K.罗谢尔盐的结构再研究——使用改进工具。I. 308 K 时的高温顺电相。
IUCrJ. 2015 Jan 1;2(Pt 1):19-28. doi: 10.1107/S2052252514022155.
6
Order-parameter coupling in the improper ferroelectric lawsonite.无序参数耦合在不恰当的铁电蓝丝辉石中。
J Phys Condens Matter. 2012 Jun 27;24(25):255901. doi: 10.1088/0953-8984/24/25/255901. Epub 2012 May 25.
7
Improper ferroelectricity in lawsonite CaAl2Si2O7(OH)2·H2O: hysteresis and hydrogen ordering.蓝片岩 CaAl2Si2O7(OH)2·H2O 中的铁电体反常现象：滞后和氢有序。
J Phys Condens Matter. 2011 Jun 8;23(22):222202. doi: 10.1088/0953-8984/23/22/222202. Epub 2011 May 16.
8
Thermally activated proton hopping in lawsonite, the ferroelectric transition at 125 K, and the co-elastic phase transition at 270 K.蓝透辉石中热激活质子跳跃、125 K 时的铁电相变和 270 K 时的共弹相相变。
J Phys Condens Matter. 2011 Mar 23;23(11):112208. doi: 10.1088/0953-8984/23/11/112208. Epub 2011 Mar 3.
9
Organic ferroelectrics.有机铁电体
Nat Mater. 2008 May;7(5):357-66. doi: 10.1038/nmat2137.