If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

The Contribution of the “Extrinsic” Polarizations to the Dielectric Tunability of Pb(Mg1/3Nb2/3)1−xTixO3 Relaxor Ferroelectrics

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Pure perovskite Pb(Mg1/3Nb2/3)1−x Ti x O3 (x = 0, 0.01, 0.03, 0.05, 0.07, 0.09) ceramics were prepared using a two‐stage solid state reaction process. With the increase of Ti content, the dielectric tunability and dielectric loss at x = 0.09, 25 kV/cm and 300 K reached a maximum 91% and 0.09, respectively. High dielectric tunability 82% with low dielectric loss 0.007 was obtained at x = 0.05, indicating that it is a promising tunable material. The Lorentz fit of the temperature dependence of the dielectric permittivity and the measurement of the temperature dependence of the depolarization current density showed that polar nanoregions are related to the dielectric tunability properties of these relaxor ferroelectric ceramics. The Landau‐Ginsberg‐Devonshire and multipolarization‐mechanism model fitted results of the electric field dependence of the dielectric permittivity showed that the contribution of the “extrinsic” polarizations including “reorientation of nanopolar clusters” and the “motion of the cluster interphase boundaries or domain‐wall motions” to the dielectric tunability properties increased with the increase of Ti content. These results provide a clear understanding to the complicated dielectric response in a family of high‐tunability ceramics and a key to the high tunability of ferroelectrics with low loss under dc electric field.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2011.05047.x

Publication date: May 1, 2012

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more