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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.111: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Crystal Structure and Magnetic Properties of NaCu[(Cu3O)(PO4)2Cl] — Teng-Teng Jin1, Wei Liu2, Shuang Chen3, Yurii Prots3, Walter Schnelle3, Jing-Tai Zhao1, Rüdiger Kniep3, and •Stefan Hoffmann3 — 1Shanghai Institute of Ceramics, Shanghai, P. R. China — 2Ocean University of China, Qingdao, P. R. China — 3MPI CPfS, Dresden, Germany
A new copper(II) phosphate chloride, NaCu[(Cu3O)(PO4)2Cl], has been synthesized and structurally characterized. Complex chains of copper-centered polyhedra give rise to a low-dimensional magnetic behavior similar to Cu3O(MoO4)2 [1,2]. Field and temperature dependent measurements of the specific heat and the magnetic susceptibility revealed two transitions TN1 = 11.3(3) K and TN2 = 6.5(2) K. TN1 signals the long-range ordering of the Cu spins in the chains. The phase transition at TN2 is accompanied by the formation of a weak ferromagnetic moment typical for basically anti-ferromagnetic structures with spin canting.
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