Novel S = 1/2 kagome lattice materials: Cs2TiCu3F12 and Rb2TiCu3F12

Lewis James Downie; Elena I.  Ardashnikova; Chiu C.  Tang; Alexandre N. Vasiliev; Peter S.  Berndonosov; Valery A. Dolgikh; Mark A.  de Vries; Philip Lightfoot

doi:10.3390/cryst5020226

Novel S = 1/2 kagome lattice materials: Cs₂TiCu₃F₁₂ and Rb₂TiCu₃F₁₂

Lewis James Downie, Elena I. Ardashnikova, Chiu C. Tang, Alexandre N. Vasiliev, Peter S. Berndonosov , Valery A. Dolgikh, Mark A. de Vries , Philip Lightfoot

Research output: Contribution to journal › Article › peer-review

Abstract

Two new members of the A₂B′Cu₃F₁₂ family of kagome-related materials have been prepared, in order to further understand the crystal-chemical relationships, phase transitions and magnetic behaviour within this family of potentially frustrated S = ½ two-dimensional quantum magnets. Cs₂TiCu₃F₁₂ adopts a crystal structure with the ideal kagome lattice topology (space group R m) at ambient temperature. Diffraction studies reveal different symmetry-lowering structural phase transitions in single crystal and polycrystalline forms at sub-ambient temperatures, with the single crystal form retaining rhombohedral symmetry and the powder form being monoclinic. In both cases, long-range antiferromagnetic order occurs in the region 16–20 K. Rb₂TiCu₃F₁₂ adopts a distorted triclinic structure even at ambient temperatures.

Original language	English
Pages (from-to)	226-243
Number of pages	17
Journal	Crystals
Volume	5
Issue number	2
DOIs	https://doi.org/10.3390/cryst5020226
Publication status	Published - 5 May 2015

Keywords

Kagome lattice
Magnetic
Fluoride
Phase transition

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10.3390/cryst5020226

Published version_crystals-05-00226
© 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
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title = "Novel S = 1/2 kagome lattice materials: Cs2TiCu3F12 and Rb2TiCu3F12",

abstract = "Two new members of the A2B′Cu3F12 family of kagome-related materials have been prepared, in order to further understand the crystal-chemical relationships, phase transitions and magnetic behaviour within this family of potentially frustrated S = ½ two-dimensional quantum magnets. Cs2TiCu3F12 adopts a crystal structure with the ideal kagome lattice topology (space group R m) at ambient temperature. Diffraction studies reveal different symmetry-lowering structural phase transitions in single crystal and polycrystalline forms at sub-ambient temperatures, with the single crystal form retaining rhombohedral symmetry and the powder form being monoclinic. In both cases, long-range antiferromagnetic order occurs in the region 16–20 K. Rb2TiCu3F12 adopts a distorted triclinic structure even at ambient temperatures. ",

keywords = "Kagome lattice, Magnetic, Fluoride, Phase transition",

author = "Downie, {Lewis James} and Ardashnikova, {Elena I.} and Tang, {Chiu C.} and Vasiliev, {Alexandre N.} and Berndonosov, {Peter S.} and Dolgikh, {Valery A.} and {de Vries}, {Mark A.} and Philip Lightfoot",

note = "The collaboration between the University of St Andrews and Moscow State University was funded by a Royal Society International Exchanges grant, in collaboration with the Russian Foundation for Basic Research (12-03-92604). Lewis Downie thanks the EPSRC for a Ph.D. studentship via a Doctoral Training grant (EP/P505097/1). This work was carried out with the support of the Diamond Light Source, beamtime application EE7980. Alexandre Vasiliev acknowledges support of RFBR through grants Numbers 13-02-00174, 14-02-92002 and 14-02-92693. ",

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doi = "10.3390/cryst5020226",

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T2 - Cs2TiCu3F12 and Rb2TiCu3F12

AU - Downie, Lewis James

AU - Ardashnikova, Elena I.

AU - Tang, Chiu C.

AU - Vasiliev, Alexandre N.

AU - Berndonosov , Peter S.

AU - Dolgikh, Valery A.

AU - de Vries , Mark A.

AU - Lightfoot, Philip

N1 - The collaboration between the University of St Andrews and Moscow State University was funded by a Royal Society International Exchanges grant, in collaboration with the Russian Foundation for Basic Research (12-03-92604). Lewis Downie thanks the EPSRC for a Ph.D. studentship via a Doctoral Training grant (EP/P505097/1). This work was carried out with the support of the Diamond Light Source, beamtime application EE7980. Alexandre Vasiliev acknowledges support of RFBR through grants Numbers 13-02-00174, 14-02-92002 and 14-02-92693.

PY - 2015/5/5

Y1 - 2015/5/5

N2 - Two new members of the A2B′Cu3F12 family of kagome-related materials have been prepared, in order to further understand the crystal-chemical relationships, phase transitions and magnetic behaviour within this family of potentially frustrated S = ½ two-dimensional quantum magnets. Cs2TiCu3F12 adopts a crystal structure with the ideal kagome lattice topology (space group R m) at ambient temperature. Diffraction studies reveal different symmetry-lowering structural phase transitions in single crystal and polycrystalline forms at sub-ambient temperatures, with the single crystal form retaining rhombohedral symmetry and the powder form being monoclinic. In both cases, long-range antiferromagnetic order occurs in the region 16–20 K. Rb2TiCu3F12 adopts a distorted triclinic structure even at ambient temperatures.

AB - Two new members of the A2B′Cu3F12 family of kagome-related materials have been prepared, in order to further understand the crystal-chemical relationships, phase transitions and magnetic behaviour within this family of potentially frustrated S = ½ two-dimensional quantum magnets. Cs2TiCu3F12 adopts a crystal structure with the ideal kagome lattice topology (space group R m) at ambient temperature. Diffraction studies reveal different symmetry-lowering structural phase transitions in single crystal and polycrystalline forms at sub-ambient temperatures, with the single crystal form retaining rhombohedral symmetry and the powder form being monoclinic. In both cases, long-range antiferromagnetic order occurs in the region 16–20 K. Rb2TiCu3F12 adopts a distorted triclinic structure even at ambient temperatures.

KW - Kagome lattice

KW - Magnetic

KW - Fluoride

KW - Phase transition

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M3 - Article

SN - 2073-4352

VL - 5

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JO - Crystals

JF - Crystals

IS - 2

ER -

Novel S = 1/2 kagome lattice materials: Cs₂TiCu₃F₁₂ and Rb₂TiCu₃F₁₂

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