Regensburg 2016 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 14: Multiferroics II (MA with DF)

DF 14.4: Vortrag

Donnerstag, 10. März 2016, 15:45–16:00, H34

Investigation of the photostriction effect in BiFeO₃ by means of infrared and optical spectroscopy — •Florian Burkert and Christine Kuntscher — Experimentalphysik II, Universität Augsburg, D-86159 Augsburg, Germany

It has been reported that BiFeO₃ crystals change their size during illumination with visible light or ultraviolet radiation [1,2]. We studied the impact of this photostrictive effect on the optical properties of a BiFeO₃ single crystal in the infrared up to the ultraviolet frequency range by using an FTIR spectrometer and a CCD spectrograph. During illumination with various radiation sources we observe the appearance of additional absorption features in the optical spectra. We will discuss possible origins of these new features.

[1] B. Kundys et al., Nat. Mater. 9, 803 (2010)

[2] B. Kundys et al., Phys. Rev. B 85, 092301 (2012)