Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 18: Correlated Electrons: Spin Systems and Itinerant Magnets – Frustrated Magnets 2 (jointly with MA)
TT 18.13: Vortrag
Montag, 16. März 2015, 18:15–18:30, H 3005
Spin structures of S = 5/2 antiferromagnetic triangular lattices: AAg2M[VO4]2 — •Angela Möller1, Clarina R. de la Cruz2, Ngozi E. Amuneke1, and Joshua Tapp1 — 1Department of Chemistry and TcSUH, University of Houston, United States — 2Quantum Condensed Matter Division, ORNL, Oak Ridge, United States
The AAg2M[VO4]2 compounds present a unique series for studying structure-property relationships. The size of the A cation (Ba2+, K+, Rb+, or Ag+) controls i) the inter-layer distances between the magnetic triangular lattices (M, here Mn2+ or Fe3+) and ii) the distortion of the non-magnetic vanadate units. The crystal and magnetic structures were refined from neutron diffraction data under applied fields (ORNL, HB2A) and reveal the complex magnetic phase diagrams of frustrated S=5/2 triangular lattices with axial and XY-anisotropy, respectively [1].
This work was supported by the National Science Foundation (DMR-1149899) and by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.
[1] N. E. Amuneke, et al., Chem. Mater. 26, 5930 (2014).