Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Magnetic Oxides and Shape Memory Alloys (jointly with MM)

MA 35.7: Vortrag

Donnerstag, 14. März 2013, 11:00–11:15, H23

XAS Studies on All-Oxide Ferromagnetic/Ferroelectric Heterosystems: SrTiO3(001)/La0.7Sr0.3MnO3/BaTiO3 — •Hatice Doganay¹, Ingo Krug¹, Jürgen Schubert², Daniel Gottlob¹, Florian Nickel¹, Stefan Cramm¹, and Claus M. Schneider¹ — ¹Peter Grünberg Institut (PGI-6) Forschungszentrum Jülich, 52425 Jülich, Germany — ²Peter Grünberg Institut (PGI-8) Forschungszentrum Jülich, 52425 Jülich, Germany

It is predicted by ab-initio calculations, that there is a charge redistribution at the Fe/BaTiO3 (BTO) [Sahoo, S. et al. PRB 76 (2007) 092108] interface, which is induced by the ferroelectric polarization, changing the interfacial magnetization of the ferromagnet. Considering the theoretical predictions [Burton, J. D. and Tsymbal, E.Y., PRB 80 (2009) 174406], it is very important to improve our knowledge of the interface properties of these so called artificial multiferroics. To avoid uncontrolled oxidation of the metal layer, we use fully oxidic systems such as BTO/La0.7Sr0.3MnO3(LSMO) layered heterostructures. The present work represents an x- ray absorption spectroscopy study on the all-oxide ferromagnetic /ferroelectric heterosystem SrTiO3(001)/LSMO/BTO fabricated by pulsed laser deposition. To provide accurate information on differences in the electronic properties as a function of oxygen background pressure during BTO growth, XAS measurements with polarized x-rays have been performed.