Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 77: Multiferroics
(Joint session of MA, DF, DS, KR and TT organized by MA)
TT 77.5: Vortrag
Donnerstag, 10. März 2016, 16:15–16:30, H34
Epitaxial engineering of ferrimagnetic 3d-5d double perovskites as templates for single phase multiferroics — •Vikas Shabadi1, Ashish Kulkarni1,2, Philipp Komissinskiy1, Ivetta Slipukhina3, Robert Paria Sena4, Joke Hadermann4, Rajeev Gupta2, Hongbin Zhang1, Marjana Ležaić3, and Lambert Alff1 — 1Institute of Materials Science, Technische Universität Darmstadt, Germany — 2Materials Science Programme, IIT Kanpur, India — 3Peter Grünberg Institut, Forschungzentrum Jülich and JARA, Germany — 4Electron Microscopy for Materials Science (EMAT), University of Antwerp, Belgium
3d-5d double perovskites (A2BB′O6) are of high interest due to the possible large magnetic ordering temperatures [1], multiferroicity, and the influence of spin-orbit coupling. We have for the first time synthesized in thin film form double perovskites with Mn2+/Re4+ and Ni2+/Re4+ cations at the B/B′-sites and La3+ at the A-site, previously predicted by density functional theory (DFT). We have shown the almost perfect ordering at the B-site by X-ray diffraction and high-angle annular dark field scanning transmission electron microscopy. The magnetic properties of the compounds studied by SQUID magnetometry and element specific X-Ray magnetic circular dichroism (XMCD) confirm a robust ferrimagnetic order in agreement with the DFT calculations. The results provide a valuable framework for engineering new single-phase multiferroics with ferroelectrically active A-site cations.
Y. Krockenberger et al., Phys. Rev. B 75, 020404(R) (2007).