Structural behaviour of BiFeO3/SrRuO3 superlattices: An X-ray diffraction and Raman spectroscopy investigation

S. Yousfi (1) , M. El Marssi (2) , H. Bouyanfif (2)

1 UMMTO - Université Mouloud Mammeri [Tizi Ouzou]
2 LPMC - Laboratoire de Physique de la Matière Condensée - UR UPJV 2081

Epitaxial BiFeO3/SrRuO3 superlattices have been grown by pulsed laser deposition on a (001) oriented LaAlO3 substrate and probed by X-ray diffraction and Raman spectroscopy. To investigate the structural competition between rhombohedral BiFeO3 and orthorhombic SrRuO3 the total thickness of all SLs was kept constant and the bilayer thickness (period) ? was varied. The interlayer strain effects are therefore tuned from large strain effects (short ? period) to quasirelaxed structure (large ?). A complementary investigation using X-ray diffraction and phonon dynamics hints to change from a rhombohedral to a tetragonal structure in the superlattices with the increase of the interlayer strain effect.

Domaines: Matière Condensée [cond-mat]

S. Yousfi, M. El Marssi, H. Bouyanfif. Structural behaviour of BiFeO3/SrRuO3 superlattices: An X-ray diffraction and Raman spectroscopy investigation. Superlattices and Microstructures, 2021, 156, ⟨10.1016/j.spmi.2021.106983⟩. ⟨hal-03627234⟩