Elucidation of dipolar dynamics and the nature of structural phases in the [(CH3)2NH2][Zn(HCOO)3] hybrid perovskite framework

被引：28

作者：

Simenas, Mantas ^{[1
]}

Balciunas, Sergejus ^{[1
]}

Ciupa, Aneta ^{[2
]}

Vilciauskas, Linas ^{[3
,4
]}

Jablonskas, Dziugas ^{[1
]}

Kinka, Martynas ^{[1
]}

Sieradzki, Adam ^{[5
]}

Samulionis, Vytautas ^{[1
]}

Maczka, Miroslaw ^{[2
]}

Banys, Juras ^{[1
]}

机构：

[1] Vilnius Univ, Fac Phys, Sauletekio Ave 9, LT-10222 Vilnius, Lithuania

[2] Polish Acad Sci, Inst Low Temp & Struct Res, POB 1410, PL-50950 Wroclaw 2, Poland

[3] Vilnius Univ, Inst Chem, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania

[4] Ctr Phys Sci & Technol, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania

[5] Wroclaw Univ Sci & Technol, Dept Expt Phys, Wybrzeze Wyspianskiego 27, PL-50370 Wroclaw, Poland

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2019年 / 7卷 / 22期

关键词：

METAL-ORGANIC PEROVSKITE; ELECTRON-PARAMAGNETIC-RESONANCE; PROMINENT DIELECTRIC ANOMALIES; NEGATIVE THERMAL-EXPANSION; RELAXOR FERROELECTRICS; WEAK FERROMAGNETISM; FORMATE FRAMEWORKS; GLASSY BEHAVIOR; CATIONIC MOTION; TRANSITION;

D O I：

10.1039/c9tc01275c

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The indications of peculiar multiferroic behavior of dimethylammonium metal-formate perovskite frameworks raised important questions about the origin of the structural phase transition, structural phases and dipolar dynamics in these compounds. Here we provide answers on some of these phenomena by presenting a comprehensive experimental and theoretical study of the [(CH3)(2)NH2][Zn(HCOO)(3)] framework. Broadband dielectric spectroscopy assisted by molecular dynamics simulations allows us to probe the dipolar relaxation dynamics in both structural phases on an extensive time scale. The results of dielectric spectroscopy are complemented by non-linear dielectric susceptibility, electric field dependent and ultrasonic experiments. Contrary to a prevailing notion, we clearly demonstrate that the [(CH3)(2)NH2][Zn(HCOO)(3)] perovskite is not a relaxor material and raise serious doubts about its proper ferroelectric nature.

引用

页码：6779 / 6785

页数：7

共 60 条

[1] Understanding Ferroelectricity in the Pb-Free Perovskite-Like Metal Organic Framework [(CH3)2NH2]Zn(HCOO)3: Dielectric, 2D NMR, and Theoretical Studies [J].