Long-range stripe nanodomains in epitaxial (110)-BiFeO 3 thin films on (100)-NdGaO 3 substrate

Long-range stripe nanodomains in epitaxial (110)-BiFeO₃ thin films on (100)-NdGaO₃ substrate

yogesh sharma ^{1, 2, 3}, Radhe Agarwal ², Charudatta Phatak ³, Ram S. Katiyar ², Seungbum Hong ^{3, 4}

¹ Oak Ridge National Laboratory, Knoxville, United States
² University of Puerto Rico, San Juan, United States
³ Argonne National Laboratory, Lemont, United States
⁴ KAIST, Daejeon, Korea, Republic of (South)

We have observed ferroelectric and ferroelastic nanodomains in (110)-oriented BiFeO₃ (BFO) thin films epitaxially grown on low symmetric (100) NdGaO₃ (NGO) substrate. We observed long range ordering of ferroelectric 109° stripe nanodomains separated by periodic vertical domain walls in as-grown 130 nm thick BFO films. The effect of La_0.67Sr_0.33CoO₃ (LSCO) conducting interlayer on domain configurations in BFO/NGO film was also observed with relatively short range-ordering of stripe domains due to the modified electrostatic boundary conditions in BFO/LSCO/NGO film. Additional studies on B-site doping of Nb ions in BFO films showed change in the domain structures due to doping induced change in lattice anisotropy while maintaining the stripe domain morphology with 109° domain wall. This long-range array of ferroelectric and ferroelastic domains can be useful for optoelectronic devices and ferroelastic templates for strain coupled artificial magnetoelectric heterostructures.

Reference:

Th-S80-O-02

Presenter/s:

yogesh sharma

Presentation type:

Oral communication

Room:

Room3

Chair/s:

Xiang Ming Chen

Date:

Thursday, September 7th, 2017

Time:

15:15 - 15:30

Session times:

15:00 - 16:15

IMF2017