Regensburg 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 8: [MA] Multiferroics II (Joint Session of MA/DF/KR/DS)

DS 8.9: Vortrag

Montag, 22. März 2010, 16:15–16:30, H3

Multiferroicity in EuTiO3 and Eu1−xBaxTiO3: ab initio characterization of crystalline, magnetic and electronic structure — •Konstantin Z. Rushchanskii1, Marjana Ležaić1, and Nicola A. Spaldin21Institut für Festkörperforschung, Quanten-Theorie der Materialien, Forschungszentrum Jülich GmbH, 52425 Jülich, and JARA-FIT, Germany — 2Materials Department, University of California, Santa Barbara, CA 93106-5050, USA

We report a systematic study of possible structural transitions in EuTiO3 and ordered Eu1−xBaxTiO3 mixed compounds. We investigated phonon spectra of EuTiO3 and found strong M- and R-point instabilities, indicating antiferrodistortive structural deformations. In the ordered Eu0.5Ba0.5TiO3 compounds, the antiferrodistortive deformation is replaced by significant ferroelectric distortions, involving not only Ti, but also the magnetic Eu cation. We will discuss several scenarios of ferroelectric and antiferrodistortive transitions and their coupling with the magnetic structure. Corresponding changes in the phonon structure will be compared with available experimental data.

This document was translated from LATEX by HEVEA.
100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2010 > Regensburg