3 years ago

Band-Gap Tuning in Ferroelectric Bi2FeCrO6 Double Perovskite Thin Films

Band-Gap Tuning in Ferroelectric Bi2FeCrO6 Double
Perovskite Thin Films
A. Slaoui, D. Stoeffler, J. L. Rehspringer, S. Colis, T. Fix, G. Schmerber, A. Quattropani, A. Dinia, G. Versini, M. Lenertz
We report in this work on the variation of the optical band gap and structural properties of epitaxial Bi2FeCrO6 films grown by pulsed laser deposition on SrTiO3(001) substrates. It is shown that the band gap can be tuned by varying the laser repetition rate during deposition which has a strong impact on the Fe/Cr order inside the Bi2FeCrO6 double perovskite structure. Ab initio band structure calculations unambiguously show that the presence of antisite defects leads to an increase of the gap of about 0.25 eV with respect to the one calculated in the ideal structure. It is also shown that with increasing Fe/Cr disorder the saturation magnetization is strongly reduced along with the difference between the Fe and Cr valences. These results suggest that the band gap of Bi2FeCrO6 can effectively be engineered by modulating the deposition conditions, thus paving the way for applications such as photovoltaic conversion, memory writing, and direct CMOS integration.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b10622

DOI: 10.1021/acs.jpcc.7b10622

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.