Regensburg 2013 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 40: Poster Session Correlated Electrons

TT 40.54: Poster

Wednesday, March 13, 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.