Reduction annealing effects on the crystal structure of $T^{\prime}$-type La$_{1.8}$Eu$_{0.2}$CuO$_{4+\alpha-\delta}$

Koki Ohashi; Masaki Fujita; Masatsune Kato; Shuki Torii; Tadashi Adachi; Takanori Taniguchi; Takashi Kamiyama; Takayuki Kawamata; Tomohisa Takamatsu; Yoji Koike

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Reduction annealing effects on the crystal structure of T^(prime)-type La_(1.8)Eu_(0.2)CuO_(4+α-δ)

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arxiv 2108.02078 v1 pith:MI5ROFES submitted 2021-08-04 cond-mat.supr-con cond-mat.str-el

Reduction annealing effects on the crystal structure of T^(prime)-type La_(1.8)Eu_(0.2)CuO_(4+α-δ)

Masaki Fujita , Takanori Taniguchi , Shuki Torii , Takashi Kamiyama , Koki Ohashi , Takayuki Kawamata , Tomohisa Takamatsu , Tadashi Adachi

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Masatsune Kato Yoji Koike

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keywords alpha-deltaannealinglecooxygensstructuralalmostalthough

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We performed neutron powder diffraction measurements on the as-sintered (AS) and oxygen-reduced (OR) La$_{1.8}$Eu$_{0.2}$CuO$_{4+\alpha-\delta}$ (LECO). The structural parameters for oxygens in AS and OR samples refined by the Rietveld analysis are almost identical to those of the reference system, Pr$_{2}$CuO$_{4+\alpha-\delta}$. Thus, the two systems are comparable in terms of the structural changes in oxygens due to the annealing, although superconductivity appears only in LECO.

Reduction annealing effects on the crystal structure of T^(prime)-type La_(1.8)Eu_(0.2)CuO_(4+α-δ)

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