Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 79: Electronic structure II

O 79.2: Vortrag

Donnerstag, 17. März 2011, 15:15–15:30, WIL C107

Lattice-strain induced changes in the electronic structure of SrRuO₃ investigated by angle-resolved photoelectron spectroscopy — •Erik Kröger¹, Matthias Kalläne¹, Arndt Quer¹, Adrian Petraru², Rohit Soni², Hermann Kohlstedt², Lutz Kipp¹, and Kai Rossnagel¹ — ¹Institute of Experimental and Applied Physics, University of Kiel, 24098 Kiel, Germany — ²Department of Nanoelectronics, Technical Faculty, University of Kiel, 24143 Kiel, Germany

Changes of magnetic and electrical properties associated with atomic rearrangements, such as magnetostriction and piezoelectricity, have attracted much attention in basic research due to the possibility of novel applications. Especially transition metal oxides with perovskite crystal structure exhibit multiple electronic correlations that are linked to the crystal lattice. Ferromagnetic SrRuO₃, for example, shows lattice-strain induced changes in the magnetic moment. In order to investigate the origin of this behavior we studied the electronic structure of SrRuO₃ in different strain states by angle-resolved photoelectron spectroscopy. The SrRuO₃ samples were grown by pulsed laser deposition and were measured in different strain-states of the order of -1% to +1%. Experiments were performed at BL7 of the Advanced Light Source (Berkeley). This work was supported by the DFG through SFB 855 ”Magnetoelectric Composite Materials — Biomagnetic Interfaces of the Future”.