Abstract

The charge and orbital ordered states in the single-layered manganite crystals, Nd 1−x Sr 1+x MnO 4 (x=0.67,0.75) , have been investigated. We have observed the superlattice spots with modulation wave vector, q=( δ, δ,0), δ= 1 8 , 1 4 [ ∼ 1 6 , 1 3 ] in x=0.75[0.67] by resonant and non-resonant X-ray scattering. These results show that not only the atomic displacement pattern but also the charge-orbital structure has the unit cell of 4 2 a× 2 a×c [3 2 a× 2 a×c] .

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