Accommodation of Transformation Strains in Transverse Multiferroic Nanostructures CoFe2O4-PbTiO3
Igor Levin, Julia Slutsker, J Li, Z Tan, Alexander L. Roytburd
Variable-temperature X-ray diffraction was used to investigate the internal strains that arise from a ferroelectric phase transition in self-assembled multiferroic nanostructures CoFe2O4-PbTiO3 on (001) SrTiO3. The constraints from CoFe2O4 suppressed the c/a ratio in tetragonal PbTiO3 (without affecting its Curie temperature) while the expansion of the out-of-plane lattice parameter in PbTiO3 upon the transition induced tensile out-of-plane strain in CoFe2O4. The transformation strain was partly relieved by the 90 twin domains in PbTiO3 which reduced the net deformation of the component phases. Significant fractions of both c- and a-domains were observed despite the nanoscale of PbTiO3 in the composite films.
, Slutsker, J.
, Li, J.
, Tan, Z.
and Roytburd, A.
Accommodation of Transformation Strains in Transverse Multiferroic Nanostructures CoFe<sub>2</sub>O<sub>4-</sub>PbTiO<sub>3</sub>, Applied Physics Letters
(Accessed November 29, 2023)