Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
TT: Tiefe Temperaturen
TT 17: Symposium Quantum Magnetism in Molecule-based Materials
TT 17.3: Fachvortrag
Montag, 7. März 2005, 11:30–12:00, TU H104
Molecular solids - model systems for exploring quantum magnetism in reduced dimensions — •Michael Lang1, Bernhard Brendel1, Andreas Brühl1, Jörg Magerkurth1, Volodymyr Pashchenko1, Bernd Wolf1, Larisa Zherlitsina2, Norbert Auner2, Günter Margraf2, Hans Lerner2, and Matthias Wagner2 — 1Physikalisches Institut, J.W. Goethe-Universität Frankfurt, FOR 412, 60054 Frankfurt — 2Institut für Anorganische Chemie, J.W. Goethe-Universität, Frankfurt, FOR 412, 60439 Frankfurt
By combining open-shell transition metal ions with suitable organic linkers flexible building block systems may be produced for generating novel classes of materials, especially quantum magnets with distinct exchange-coupling topologies. A particularly interesting feature of these molecule-based magnets is their small exchange coupling constants J, weak enough for laboratory magnets to drive the systems into the interesting high-field regime where gµBB > J. In this contribution we will discuss various realizations of molecule-based low-dimensional quantum magnets such as Cu(II) cyclosiloxanolate complexes or a Cu(II) coordination polymer. The latter system can be used to study generic magnetocaloric and magnetoelastic properties of the antiferromagnetic S = 1/2 Heisenberg chain near the saturation field.