logo icmab ochoa 02 01 logo icmab ochoa 02 01
  • NEWS

Nanocrystalline Ferroelectric BiFeO3 Thin Films by Low-Temperature Atomic Layer Deposition

cm 2015 02093k 0007

Mariona Coll*Jaume GazquezIgnasi FinaZakariya KhayatAndy QuindeauMarin AlexeMaria VarelaSusan Trolier-McKinstryXavier Obradors, and Teresa Puig
Chem. Mater., 2015, 27 (18), pp 6322–6328

DOI: 10.1021/acs.chemmater.5b02093

In this work, ferroelectricity is identified in nanocrystalline BiFeO3 (BFO) thin films prepared by low-temperature atomic layer deposition. A combination of X-ray diffraction, reflection high energy electron diffraction, and scanning transmission electron microscopy analysis indicates that the as-deposited films (250 °C) consist of BFO nanocrystals embedded in an amorphous matrix. Postannealing at 650 °C for 60 min converts the sample to a crystalline film on a SrTiO3substrate. Piezoelectric force microscopy demonstrates the existence of ferroelectricity in both as-deposited and postannealed films. The ferroelectric behavior in the as-deposited stage is attributed to the presence of nanocrystals. Finally, a band gap of 2.7 eV was measured by spectroscopic ellipsometry. This study opens broad possibilities toward ferroelectric oxides on 3D substrates and also for the development of new ferroelectric perovskites prepared at low temperature.

See more posts on ICMAB related to: Materials for information science and electronics

Related Topics: Materials for information science and electronics

Also on ICMAB...

Trending on ICMAB...

Your experience on this site will be improved by allowing cookies Cookie Settings