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Low-temperature reaction of A-site-ordered layered perovskite Eu2SrFe2O7 (T structure) with CaH2 induces a shift in the Eu2O2 slabs to form Eu2SrFe2O6 with a T’ structure (I4/mmm space group) in which only the Fe cation is reduced. Contrary to the previously reported T’ structures with Jahn-Teller-active d9 cations (Cu2+ and Ni+), stabilization […] Bekijken