Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 44: Poster Session Correlated Electrons
TT 44.53: Poster
Donnerstag, 17. März 2011, 10:00–13:00, P1
Investigatons of modified interlayer coupling in the anisotropic antiferromangnet [Cu(pyz)2(HF2)]SbF6 — •R. Beyer1, J.L. Manson2, J.A. Schlueter3, and J. Wosnitza1 — 1Hochfeld-Magnetlabor (HLD), Forschungszentrum Dresden-Rossendorf (FZD), Dresden, Germany — 2Department of Chemistry and Biochemistry, EasternWashington Univ., Cheney, USA — 3Materials Science Division, Argonne National Laboratory, Argonne, USA
In recent years, many synthetic strategies have emerged with regard to the crystal engineering of functional magnetic materials. The group of J.L. Manson et al. were able to grow single crystals of a quasi-2D antiferromagnet [Cu(pyz)2(HF2)]SbF6 and a defective polymorphic pendant [Cu2(pyz)4F(HF)(HF2)](SbF6)2 where 50% of the HF2− links are broken, leading to two crystallographically unique Cu2+ sites. The chemical composition remains unchanged, the structural configuration indicates a minor Jahn-Teller distortion. We studied the two branches of this compound by means of magnetization and specific heat measurements, in order to get a better understanding of the importance of H-F hydrogen bonds for establishing long-range magnetic ordering in polymeric quantum magnets. Part of this work has been supported by EuroMagNET II.