Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 11: Magnetic Materials
MA 11.12: Vortrag
Montag, 23. März 2009, 18:15–18:30, HSZ 103
Strain induced magnetism in La0.5Ca0.5MnO3 systems — •Thomas Tietze1, Daniela Nolle1, Gisela Schütz1, Eberhard Goering1, Gülgün Aydogdu2, and Hanns-Ulrich Habermeier2 — 1Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, 70569 Stuttgart — 2Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569 Stuttgart
The La1-xCaxMnO3 exhibits, besides the double exchange relate magneto resistive effects, many interesting properties as a function of the doping level. Depending on the doping level x the system may exhibit ferromagnetism, antiferromagnetism, orbital ordering, and charge ordering. Epitaxial tensile and compressive strains are very important for the fine tuning of the lattice degree of freedom and therefore for the magnetic nearest neighbor coupling. By *adjusting* tensile and compressive strain with corresponding substrates one can switch between FM and AFM coupling between the FM ordered ab-planes. In order to investigate the influence of different substrates and relaxation effects element specific XMCD measurements were performed on La0.5Ca0.5MnO3 systems.