http://www.cnr.it/ontology/cnr/individuo/prodotto/ID22311

THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion (Articolo in rivista)

Type

Label

THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion (Articolo in rivista) (literal)

Anno

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

Alternative label

D. Nuzhnyy; J. Petzelt; I. Rychetsky; V. Buscaglia; M. T. Buscaglia; P. Nanni (2009)
THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion
in Journal of physics. D, Applied physics (Online); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
(literal)

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

D. Nuzhnyy; J. Petzelt; I. Rychetsky; V. Buscaglia; M. T. Buscaglia; P. Nanni (literal)

Pagina inizio

Pagina fine

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

http://puma.isti.cnr.it/linkres.php?resource=cnr.ieni/cnr.ieni.ge/2009-A0-023 (literal)

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

Rivista

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

In: Journal of Physics D-Applied Physics, vol. 42 (15) article n. 155408. IoP Publishing, 2009. (literal)

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

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

Note

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

Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic; CNR-IENI, Genova; DICheP-UNIGE, Genova Italy (literal)

Titolo

THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion (literal)

Abstract

Time-domain THz transmission and FTIR reflectivity spectra of dense core-shell composites of the BaZr0.2Ti0.8O3, BaZr0.4Ti0.6O3, Ba0.66Sr0.34TiO3 and Ba0.45Sr0.55TiO3 compositions were studied in a broad temperature range of 10-900 K. The spectra were evaluated to obtain the complex dielectric functions and at room temperature they were compared with the prediction of the generalized brick-wall model based on the effective medium approximation. The model was analysed concerning the dielectric losses and electric-field tunability below the polar phonon frequency range. Whereas the predicted losses are much reduced compared with those of the cores, the observed enhanced losses in the THz range give evidence of an interdiffusion of the BaTiO3 cores into the shells. (literal)

Editore