Strain analysis of multiferroic BiFeO3-CoFe2O4 nanostructures by Raman scattering

Details Strain analysis of multiferroic BiFeO3-CoFe2O4 nanostructures by Raman scattering Strain analysis of multiferroic BiFeO3-CoFe2O4 nanostructures by Raman scattering

2011-07-23

arxiv.org/abs/1107.4682v1

Appl. Phys. Lett. 99, 072901 (2011)

Physics

Condensed Matter

Materials Science

revised version submitted to Appl. Phys. Lett

Scientific paper

10.1063/1.3626595

We report a Raman scattering investigation of columnar BiFeO3-CoFe2O4 (BFO-CFO) epitaxial thin film nanostructures, where BFO pillars are embedded in a CFO matrix. The feasibility of a strain analysis is illustrated through an investigation of two nanostructures with different BFO-CFO ratios. We show that the CFO matrix presents the same strain state in both nanostructures, while the strain state of the BFO pillars depends on the BFO/CFO ratio with an increasing tensile strain along the out-of-plane direction with decreasing BFO content. Our results demonstrate that Raman scattering allows monitoring strain states in complex 3D multiferroic pillar/matrix composites.

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