We reported that the tetragonal-like phase identified in strained epitaxial BiFeO3 films on a (001) LaSrAlO4 single crystal substrates is monoclinic MC, based on high resolution synchrotron x-ray studies and piezoresponse force microscopy measurements. This M C phase has different symmetry with the rhombohedral-like monoclinic MA phase found in BiFeO3 films grown on low mismatch SrTiO3 substrates. Transmission electron microscopy revealed that the films on LaSrAlO4 substrates have a high crystalline quality and coherent interface.
Bibliographical noteFunding Information:
L.C. acknowledges the support from Nanyang Technological University and Ministry of Education of Singapore under Project No. AcRF RG 21/07 and ARC 16/08. The authors thank beamline BL14B1 (SSRF) for providing the beam time.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)