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DF: Fachverband Dielektrische Festkörper
DF 12: Poster 1
DF 12.10: Poster
Tuesday, March 12, 2013, 10:30–13:30, Poster D
Nonlinear optical probing in (Ba,Sr)TiO3/La0.7Sr0.3MnO3 multilayers — •Johannes Aprojanz1,2, Arseni Buryakov2, Elena Mishina2, Markus Michelmann1, and Vasily Moshnyaga1 — 1I. Physikalisches Institut, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen — 2Moscow State Institute of Radioengineering, Electronics and Automation, Prosp. Vernadskogo 78, 119454 Moscow, Russia
Ferroelectric oxides stand out due to their excellent nonlinear optical properties and strong electro-optic effect, which offer promising applications as electro-optical modulators. Second harmonic generation (SHG) as a nonlinear optical probe is a powerful tool for studying ferroelectric switching, since it gives direct insight into the domain state in the material. In this work, we report on SHG measurements on BaxSr1−xTiO3/La0.7Sr0.3MnO3 (BSTO/LSMO), x = 0.15 − 0.5, multilayers grown on SrTiO3 substrates by means of metalorganic aerosol deposition (MAD). The voltage characteristics of SHG-signal prove ferroelectric hysteretic behavior at room temperature with switching fields in the range of 100 kV/cm. A detailed study of ferroelectric properties will be given as a function of magnetic field, B = 0 − 1 T. This work was supported by IFOX of the European Community’s 7th Framework Programme.