Regensburg 2013 – scientific programme
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DS: Fachverband Dünne Schichten
DS 7: Multiferroics 2 (jointly with DF, KR, MA, TT)
DS 7.9: Talk
Monday, March 11, 2013, 17:15–17:30, H3
Epitaxial thin films of the multiferroic double perovskite Bi2FeCrO6 — •Vikas Shabadi, Mehran Vafaee, Mehrdad BaghaieYazdi, Aldin Radetinac, Philipp Komissinskiy, and Lambert Alff — Institute of Materials Science, Technische Universität Darmstadt, Germany
Co-existence of magnetism and ferroelectricity was theoretically predicted in the ordered double perovskite Bi2FeCrO6 (BFCO) [1]. We report epitaxial BFCO thin films grown by pulsed laser deposition from a 20% Bi-rich ceramic target on single crystal SrTiO3(100) substrates. The degree of the Fe-Cr cation ordering in the BFCO films was calculated based on the X-ray diffraction patterns. The magnetic moments of the BFCO films were measured with a SQUID magnetometer and analyzed as a function of the Fe-Cr ordering. The discrepancies in the previously reported values of the magnetic moment of BFCO [2,3] are most likely connected to the varying degree of the Fe-Cr cation ordering in the samples. In a recent experiment more than 90% spontaneous B-site ordering in a similar Fe-Cr based double perovskite system has been achieved [4]. Anti-site disorder control is a key challenge to design double perovskite multiferroics.
[1]P. Baettig and N. A. Spaldin, Appl. Phys. Lett. 86, 012505 (2005)
[2]Kim et al., Appl. Phys. Lett. 89, 102902 (2006)
[3]R. Nechache et al., J. Appl. Phys. 105, 061621 (2009)
[4]S. Chakraverty et al., Phys. Rev. B 84, 064436 (2011)
The authors acknowledge support from DAAD.