Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 47: Multiferroics II (jointly with DF, KR, TT)

MA 47.5: 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 Kulkarni^1,2, 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).