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Journal Articles Journal of Applied Physics Year : 2009

Charge order, dielectric response, and local structure of La5/3Sr1/3NiO4 system

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Abstract

Charge ordering, dielectric permittivity, and local structure of La5/3Sr1/3NiO4 system have been explored by x-ray charge scattering, complex dielectric impedance spectroscopy, and extended x-ray absorption fine structure (EXAFS) measurements, made on the same single crystal sample. The local structure measured by the temperature-dependent, polarized Ni K-edge EXAFS shows significant distortions in the NiO2 planes. These local distortions could be reasonable cause of high dielectric permittivity of the title system (ε≈100 at 5 K) with the charge ordering in this system being a ferroelectriclike second order transition.

Dates and versions

hal-03545218 , version 1 (27-01-2022)

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M. Filippi, B. Kundys, S. Agrestini, Wilfrid Prellier, H. Oyanagi, et al.. Charge order, dielectric response, and local structure of La5/3Sr1/3NiO4 system. Journal of Applied Physics, 2009, 106 (10), pp.104116. ⟨10.1063/1.3260222⟩. ⟨hal-03545218⟩
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