TITLE

Dielectric response of the charge-ordered two-dimensional nickelate La1.5Sr0.5NiO4

AUTHOR(S)
Rivas, J.; Rivas-Murias, B.; Fondado, A.; Mira, J.; Señarís-Rodríguez, M. A.
PUB. DATE
December 2004
SOURCE
Applied Physics Letters;12/20/2004, Vol. 85 Issue 25, p6224
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the dielectric response of La1.5Sr0.5NiO4, a system that experiences charge ordering above room temperature (TCO=480 K) and a rearrangement of its charge-order pattern in the temperature region 160–200 K. A careful analysis of the role of the electrical contacts used, sample thickness, and grain size on the experimental data allows us to determine that this material exhibits a high intrinsic dielectric constant. In addition, the temperature dependence of the dielectric constant, that shows a maximum in the region of the rearrangement of the charge-order pattern, points to a link between the two phenomena.
ACCESSION #
15374328

 

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