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

2009/01/31 by M. Filippi, M Filippi, B. Kundys +9
Materials Science · Physics and Astronomy · #Dielectric properties of ceramics #Ferroelectric and Piezoelectric Materials #Nuclear materials and radiation effects #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1063/1.3260222

published as JOURNAL OF APPLIED PHYSICS 106, 104116 (2009) · 12 pages, 5 figures

openalex publication_date 2009/11/15 · arxiv created 2009/11/20 · arxiv updated 2009/12/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

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.

Citations

• Novel Dielectric Anomaly in the Hole-DopedLa2Cu1−xLixO4andLa2−xSrxNiO4Insulators: Signature of an Electronic Glassy State
• Melting of Quasi-Two-Dimensional Charge Stripes inLa5/3Sr1/3NiO4
• Magnetic ordering in the striped nickelate La5/3Sr1/3NiO4: A band structure point of view