Pressure-Temperature-Magnetic Field Phase Diagram of Multiferroic (NH4)2FeCl5<middle dot>H2O

被引：1

作者：

Clune, Amanda J. ^{[1
]}

Harms, Nathan C. ^{[1
]}

Smith, Kevin A. ^{[1
]}

Tian, Wei ^{[2
]}

Liu, Zhenxian ^{[3
]}

Musfeldt, Janice L. ^{[1
,4
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA

[3] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[4] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

来源：

INORGANIC CHEMISTRY | 2024年 / 63卷 / 24期

基金：

美国国家科学基金会;

关键词：

BILBAO CRYSTALLOGRAPHIC SERVER; FERROELECTRIC POLARIZATION; K2FECL5.H2O; WATER; RAMAN; (NH4)2FECL5.H2O; CALIBRATION; TRANSITION; BEHAVIOR; NEUTRON;

D O I：

10.1021/acs.inorgchem.4c00403

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We combined synchrotron-based infrared absorbance and Raman scattering spectroscopies with diamond anvil cell techniques and a symmetry analysis to explore the properties of multiferroic (NH4)(2)FeCl5<middle dot>H2O under extreme pressure-temperature conditions. Compression-induced splitting of the Fe-Cl stretching, Cl-Fe-Cl and Cl-Fe-O bending, and NH4+ librational modes defines two structural phase transitions, and a group-subgroup analysis reveals space group sequences that vary depending upon proximity to the unexpectedly wide order-disorder transition. We bring these findings together with prior high-field work to develop the pressure-temperature-magnetic field phase diagram uncovering competing polar, chiral, and magnetic phases in this system.

引用

页码：11021 / 11029

页数：9

共 61 条

[1] Thermodynamic properties of the new multiferroic material (NH4)2[FeCl5(H2O)] [J].