Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 74: Surface and Interface Magnetism II (O jointly with MA)

O 74.3: Talk

Thursday, April 3, 2014, 11:00–11:15, WIL C107

Control of ferromagnetism in epitaxial La_0.7Sr_0.3MnO₃ films via BaTiO₃ substrate phase transitions investigated by XMCD and XLD — •Arndt Quer¹, Erik Kröger¹, Kerstin Hanff¹, Lars Oloff¹, Rohit Soni², Adrian Petraru², Matthias Kalläne¹, Herrmann Kohlstedt², Lutz Kipp¹, and Kai Rossnagel¹ — ¹Institute of Experimental and Applied Physics, University of Kiel, Germany — ²Department of Nanoelectronics, University of Kiel, Germany

It is known that La_0.7Sr_0.3MnO₃ thin films grown on BaTiO₃ can undergo strain-controlled giant, sharp, and persistent magnetization changes as a result of substrate structural phase transitions. In order to investigate the interplay between lattice strain, magnetism, and electronic structure in this system, we have performed X-ray magnetic circular dichroism (XMCD) and X-ray linear dichroism (XLD) measurements on 20-nm thin, epitaxial La_0.7Sr_0.3MnO₃ films grown by pulsed laser deposition on single-crystalline BaTiO₃. Here, we report the obtained results. Experiments were performed at the BACH beamline of the Elettra syncrotron storage ring (Trieste, Italy). This work was supported by the DFG (German Research Foundation) through SFB 855 (Collaborative Research Centre 855) "Magnetoelectric Composites - Future Biomagnetic Interfaces".