English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

International audienceLarge size and high quality single crystals of Nd2−xSrxNiO4+δ and Pr2−xSrxNiO4+δ, with selected composition(x = 0.0, 0.1 and 0.5), were grown by a floating-zone technique using an image furnace. We found thateven small deviations from the ideal cation stoichiometry led to either NiO segregation or formation ofNi-poor Pr4Ni3O10−x, or RExOy intergrowth phases, rendering the title compounds unstable even underambient conditions. Related to potential applications as membranes in SOFC, we importantly foundNd2−xSrxNiO4+δ and Pr2−xSrxNiO4+δ powders, obtained from ground stoichiometric single crystals, to be stablein air at high temperature (1000 °C), contrary to the partial decomposition observed when synthesizedas polycrystalline powders by classical solid state synthesis. The presence of NiO/Pr4Ni3O10−x or RExOyintergrowth phases are discussed as a drawback limiting high temperature stability for Pr2NiO4+δ. Grownsingle crystals were characterised by neutron and X-ray diffraction as well as by electron microscopy (SEM/EDS), revealing their excellent quality in terms of composition, homogeneity and crystallinity. For each crystal,the oxygen content was determined by thermogravimetric analysis in a reductive atmosphere. Transmissionelectron microscopy highlighted a complex incommensurate structure for Pr2NiO4.25 andNd2NiO4.25 with a 2D modulation vector related to oxygen ordering

crystengcomm

Growth of high quality single crystals of strontium doped (Nd,Pr)-nickelates, Nd2−xSrxNiO4+δand Pr2−xSrxNiO4+δ