Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.27: Poster
Montag, 20. März 2017, 15:00–19:00, P2-EG
Characterization and optimized synthesis parameters of haydeeite α-Cu3Mg(OH)6Cl2, an S = 1/2 kagome magnet — •Joy Desor, Pascal Puphal, and Cornelius Krellner — Physikalisches Institut, Goethe-University Frankfurt, 60438 Frankfurt am Main, Germany
Haydeeite α-Cu3Mg(OH)6Cl2 is one of the few examples of S = 1/2 kagome magnets, that do not show the conventional Néel order at low temperatures[1]. It is the Mg equivalent of kapellasite, the isostructural compound of the prominent spin liquid candidate herbertsmithite.
We present the results of the haydeeite synthesis via the known reflux and a new hydrothermal approach. We have varied several parameters, as e.g. molar ratios, time and temperature gradient. The results were analyzed by PXRD and EDS. This will serve as a starting point for the crystal growth under hydrothermal conditions. Observation of the magnetic properties at low temperatures and specific heat reveals the features of highly frustrated kagome systems.
[1] R.H. Colman, A. Sinclair, and A.S. Wills, Chem. Mat. 22, 5774 (2010).