Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 40: Poster Session Correlated Electrons
TT 40.54: Poster
Mittwoch, 13. März 2013, 15:00–19:00, Poster D
Growth and physical properties of La8Cu7O19 single crystals — •Ashwin Mohan1, Surjeet Singh2, Wolf Schottenhamel1, Giacomo Prando1, Sven Partzsch1, Valentina Bisogni1, Abdel-Hafez Mahmoud1, Jochen Geck1, Sabine Wurmehl1, Christian Hess1, and Bernd Büchner1 — 1IFW Dresden, Germany — 2IISER Pune, India
Spin ladder compounds are valuable in understanding the physics of crossover from one dimensional to the two dimensional nature of spin systems. They have been known to show interesting magnetic ground states and even superconductivity upon doping. Gapped and ungapped spin excitation spectra have been predicted and experimentally verified for spin ladders with even and odd number of ladder-legs respectively. Therefore, this class of materials has been of particular interest in the field of low dimensional quantum magnets. It is known that in the thermodynamic phase diagram of La2O3-CuO there exists a compound whose spin structure resembles that of a five leg ladder, though there has not been much progress towards understanding its magnetism as it is challenging to grow it as a single crystal. Here, we have used the travelling floating zone method to grow single crystals of La8Cu7O19 and measured some of its physical properties. This compound magnetically orders below 103K and shows anisotropic magnetic behavior, the nature of which is not yet clear.