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

DOI: 10.3390/cryst5020226

Authors: Lewis Downie (University of St Andrews) , Elena Ardashnikova (M. V. Lomonosov Moscow State University) , Chiu Tang (Diamond Light Source) , Alexandre Vasiliev (M. V. Lomonosov Moscow State University) , Peter Berdonosov (M. V. Lomonosov Moscow State University) , Valery Dolgikh (M. V. Lomonosov Moscow State University) , Mark De Vries (University of Edinburgh) , P Lightfoot (University of St Andrews)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Crystals , VOL 5 (2) , PAGES 226 - 243

State: Published (Approved)
Published: May 2015
Diamond Proposal Number(s): 7980

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 R3¯ 3 ¯ 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.

Subject Areas: Chemistry, Materials


Instruments: I11-High Resolution Powder Diffraction

Other Facilities: HRPD at ISIS

Added On: 09/05/2015 11:38

Documents:
crystals-05-00226.pdf

Discipline Tags:

Physics Physical Chemistry Chemistry Magnetism Materials Science Chemical Engineering Engineering & Technology Inorganic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction