http://www.cnr.it/ontology/cnr/individuo/prodotto/ID21704

Preparation of multiferroic composites of BaTiO3-Ni0.5Zn0.5Fe2O4 ceramics (Articolo in rivista)

Type

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

Label

Preparation of multiferroic composites of BaTiO3-Ni0.5Zn0.5Fe2O4 ceramics (Articolo in rivista) (literal)

Anno

2006-01-01T00:00:00+01:00 (literal)

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

10.1016/j.jeurceramsoc.2006.02.022 (literal)

Alternative label

A. Testino; L. Mitoseriu; V. Buscaglia; M.T. Buscaglia; I. Pallecchi; A.S. Albuquerque; V. Calzona; D. Marré; A.S. Siri; P. Nanni (2006)
Preparation of multiferroic composites of BaTiO3-Ni0.5Zn0.5Fe2O4 ceramics
in Journal of the European Ceramic Society; Elsevier Science Ltd., Oxford (Regno Unito)
(literal)

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

A. Testino; L. Mitoseriu; V. Buscaglia; M.T. Buscaglia; I. Pallecchi; A.S. Albuquerque; V. Calzona; D. Marré; A.S. Siri; P. Nanni (literal)

Pagina inizio

3031 (literal)

Pagina fine

3036 (literal)

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

http://puma.isti.cnr.it/linkres.php?resource=cnr.ieni/cnr.ieni.ge/2006-A0-016 (literal)

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

26 (literal)

Rivista

Journal of the European Ceramic Society (Rivista)

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

In: Journal of the European Ceramic Society, vol. 26 (14) pp. 3031-3036. Elsevier, 2006. (literal)

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

14 (literal)

Note

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

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

Department of Chemical & Process Engineering, University of Genoa, P-le Kennedy nr. 1, I-16129 Genoa, Italy; Department of Solid State & Theoretical Physics, Al. I. Cuza University, Blvd. Carol 11, Iasi 700506, Romania; Institute for Energetics & Interfases--CNR, Via de Marini 6, Genoa I-16149, Italy; Department of Physics, University of Genoa, Via Dodecaneso 33, I-16146, Genoa, Italy; Centro de Desenvolvimento da Tech. Nuclear, CP 941, 30123-970, Belo Horizonte, Brazil (literal)

Titolo

Preparation of multiferroic composites of BaTiO3-Ni0.5Zn0.5Fe2O4 ceramics (literal)

Abstract

Magneto-electric coupling in ceramic composites formed by ferroelectric and ferromagnetic phases can be obtained via an adequate mechanical coupling between the individual piezoelectric and magnetostrictive phases (product property). In the present work, the possibility of forming diphase ferroelectric-ferromagnetic ceramics has been investigated. Composites of xBaTiO3-(1 - x)Ni0.5Zn0.5Fe2O4 with x = 0.5, 0.6 and 0.7 were prepared according two different procedures: (i) by direct mixing powders of perovskite BaTiO3 and Ni0.5Zn0.5Fe2O4 spinel prepared by solid state and (ii) by coprecipitating Fe(III)-Ni(II)-Zn(II) nitric salts in a NaOH solution in which the BaTiO3 powders were previously dispersed. Optimum processing parameters for good homogeneity, densification and for a reduction of the chemical reactions at the interfaces ferroelectric-ferrite were found. A temperature and composition-dependent magnetic order is present in all the composites, with a dilution effect of the magnetisation due to the presence of the non-ferromagnetic phase. A diffuse ferroelectric-paraelectric transition due to the BaTiO3 phase was identified by the temperature-dependence of the permittivity and losses, showing that at room temperature the material preserves a ferroelectric order. The interfaces play important roles in the dielectric properties, causing space charge effects and Maxwell-Wagner relaxation, particularly at low frequencies and high temperatures. The combined ferroelectric and magnetic ordering will result in magneto-electric coupling in this material; further investigations are necessary. (literal)

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