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Influence of Mn-doping on phase transition characteristics and relaxor behaviour of lead lanthanum zirconate titanate ceramics

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10.1016/j.jeurceramsoc.2011.12.024
 
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hdl:2117/16424

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Pérez Delfín, Enrique
García García, José EduardoMés informacióMés informacióMés informació
Vega García, A.
Guerrero, Fidel
Eiras, Jose A.
Document typeArticle
Defense date2012-07
PublisherElsevier
Rights accessRestricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Changes in dielectric response features of lead lanthanum zirconate titanate (PLZT) ceramics by manganese addition are reported in the present work. Both the PLZT relaxor behaviour and the frequency dependence of the room temperature dielectric constant are shown to be suppressed by the addition of manganese. Similar results are obtained by applying a bias external field or by chemical reduction of PLZT samples, thus indicating the presence of an interrelationship between oxygen vacancies and the random ‘bias’ electric field. Consequently, the defects created by oxygen vacancies appear as the most important factor causing the disappearance of relaxor behaviour in Mn-doped PLZT ceramics. No modifications in the diffuse phase transition with the manganese content are found, which may be due to the persistence of compositional disorder. Additionally, it was verified that the spin glass model cannot be used to describe these observed effects.
CitationPérez-Delfín, E. [et al.]. Influence of Mn-doping on phase transition characteristics and relaxor behaviour of lead lanthanum zirconate titanate ceramics. "Journal of the european ceramic society", Juliol 2012, vol. 32, núm. 8, p. 1659-1665. 
URIhttp://hdl.handle.net/2117/16424
DOI10.1016/j.jeurceramsoc.2011.12.024
ISSN0955-2219
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S095522191100673X
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