Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Bio- and Molecular Magnetism
MA 3.4: Vortrag
Montag, 26. März 2012, 10:15–10:30, EB 202
Magnetocaloric properties of gadolinium based heterometallic molecules studied by the finite-temperature Lanczos method — Christian Heesing1, Oliver Wendland1, Thomas N. Hooper2, Euan Brechin2, and •Jürgen Schnack1 — 1Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld — 2School of Chemistry, University of Edinburgh, Edinburgh, U.K.
The magnetocaloric effect enables one to heat or cool by varying the applied magnetic field. Magnetic molecules with a high density of low-lying high spin multiplets are especially desirable in this context since they lead to big entropy changes when sweeping the field isothermally. In this contribution we discuss gadolinium based heterometallic molecules that have been modeled by means of the finite-temperature Lanczos method [1]. This method generates very accurate approximations of thermal observables for Hilbert space dimensions of up to 1010.
[1] J. Schnack, O. Wendland, Eur. Phys. J. B 78 (2010) 535-541