http://www.cnr.it/ontology/cnr/individuo/prodotto/ID298641

Broadband dielectric spectroscopy of BaTiO3-Ni 0.5Zn0.5Fe2O4 composite ceramics (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Broadband dielectric spectroscopy of BaTiO3-Ni 0.5Zn0.5Fe2O4 composite ceramics (Articolo in rivista) (literal)

Anno

2014-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.jallcom.2014.03.041 (literal)

Alternative label

Sakanas A.; Grigalaitis R.; Banys J.; Mitoseriu L.; Buscaglia V.; Nanni P. (2014)
Broadband dielectric spectroscopy of BaTiO3-Ni 0.5Zn0.5Fe2O4 composite ceramics
in Journal of alloys and compounds; ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE (Svizzera)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Sakanas A.; Grigalaitis R.; Banys J.; Mitoseriu L.; Buscaglia V.; Nanni P. (literal)

Pagina inizio

241 (literal)

Pagina fine

247 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.sciencedirect.com/science/article/pii/S0925838814006185 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

602 (literal)

Rivista

Journal of alloys and compounds (Rivista)

Note

ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1-3 : Faculty of Physics, Vilnius University, Sauletekio Ave. 9-III, LT-10222 Vilnius, Lithuania / 4 : Department of Physics, Al. I. Cuza University, Bv. Carol 1 No. 11, Iasi 700506, Romania / 5,6 : Institute for Energetics and Interphases, CNR, Via de Marini No. 6, Genoa 1-16149, Italy / 6 : Department of Chemistry and Process Engineering, University of Genoa, P-le Kennedy No. 1, Genoa, Italy (literal)

Titolo

Broadband dielectric spectroscopy of BaTiO3-Ni 0.5Zn0.5Fe2O4 composite ceramics (literal)

Abstract

The behavior of three xBaTiO(3)-(1 -x) Ni0.5Zn0.5Fe2O4 composites (x = 0.50, 0.60 and 0.70 M ratios) were studied using the broadband dielectric spectroscopy methods in the broad frequency and temperature ranges. x = 0.70 composition clearly exhibits similar dielectric response to that of pure barium titanate, while the response of the composite with the highest concentration of nickel-zinc ferrite is largely influenced by the conductivity, especially at the highest temperatures and lowest frequencies. In the non-dispersive region the permittivity gradually increases with increasing level of high-permittivity barium titanate material as a result of the \"sum property'', while the low frequency behavior described by complex contributions do not show a systematical modification with the changing composition. At around 108-1010 Hz frequencies the dispersion process was observed and approximated with the Cole-Cole equation, finding the parameters describing the process. Presumably, lattices of barium titanate in close vicinity to nickel-zinc ferrite could lead to the distortion and some shifting of ions in barium titanate lattice, possibly affecting the states that Ti can occupy. The conductivity process was approximated with the recently suggested generalized Joncher's relationship, which manages to describe both low and high frequency conductivity processes observed. The computed corresponding activation energies for all the samples were found to be similar to oxide composites containing ferrites with ionic conduction contributions. (C) 2014 Elsevier B.V. All rights reserved. (literal)

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