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BIBTEX RIS

Caracterización estructural de los óxidos de níquel con orden de carga: La<sub>3/2</sub>Sr<sub>1/2</sub>NiO<sub>4</sub> y La<sub>5/3</sub>Sr<sub>1/3</sub>NiO<sub>4</sub>

2006; Elsevier BV; Volume: 45; Issue: 3 Linguagem: Inglês

10.3989/cyv.2006.v45.i3.299

ISSN

2173-0431

Autores

B. Rivas‐Murias, J. Mira, A. Fondado, M. A. Señarís‐Rodríguez, J. Rivas,

Tópico(s)

Dielectric properties of ceramics

Resumo

In this work, we study the dielectric properties of the layered perovskites La 3/2 Sr 1/2 NiO 4 and La 5/3 Sr 1/3 NiO 4 in the frequency range 20 Hz-1 MHz and in the temperature range 110-350 K.For this study, we have synthesized single phase polycrystalline samples by a conventional solid-state reaction.These nickelates show very high values of the dielectric constant at room temperature (ε' r ~ 10 5 ), that make them very attractive for potential applications, provided that their rather high losses can be minimized.The obtained results reveal that even if their dielectric behavior is strongly enhanced by extrinsic polarization effects, there is also a very interesting correlation between their dielectric response and their electronic state.

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