2014/12/08 by M. Lacotte, Morgane Lacotte, A. David +13 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Composite material #Crystal structure #Crystallite #Crystallography #Diffraction #Electron backscatter diffraction #Electron diffraction #Epitaxy #Geology #Grain growth #Grain size #Isostructural #Magnetic and transport properties of perovskites and related materials #Materials science #Microstructure #Multiferroics and related materials #Nanotechnology #Optics #Physics #Substrate (aquarium) #Thin film #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1063/1.4905012
published as J. Appl. Phys. 116 (2014) 245303 · Submitted to J. Appl. Phys
arxiv created 2014/12/08 · openalex publication_date 2014/12/23 · arxiv updated 2014/12/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The local epitaxial growth of pulsed laser deposited Ca2MnO4 films on polycrystalline spark plasma sintered Sr2TiO4 substrates was investigated to determine phase formation and preferred epitaxial orientation relationships (ORs) for isostructural Ruddlesden-Popper (RP) heteroepitaxy, further developing the high-throughput synthetic approach called Combinatorial Substrate Epitaxy (CSE). Both grazing incidence X-ray diffraction and electron backscatter diffraction patterns of the film and substrate were indexable as single-phase RP-structured compounds. The optimal growth temperature (between 650 °C and 800 °C) was found to be 750 °C using the maximum value of the average image quality of the backscattered diffraction patterns. Films grew in a grain-over-grain pattern such that each Ca2MnO4 grain had a single OR with the Sr2TiO4 grain on which it grew. Three primary ORs described 47 out of 49 grain pairs that covered nearly all of RP orientation space. The first OR, found for 20 of the 49, was the expected RP unit-cell over RP unit-cell OR, expressed as [100][001]film||[100][001]sub. The other two ORs were essentially rotated from the first by 90°, with one (observed for 17 of 49 pairs) being rotated about the [100] and the other (observed for 10 of 49 pairs) being rotated about the [110] (and not exactly by 90°). These results indicate that only a small number of ORs are needed to describe isostructural RP heteroepitaxy and further demonstrate the potential of CSE in the design and growth of a wide range of complex functional oxides.