Anelastic Characterization of Pb(Fe2/3W1/3)O-3 Multiferroic Ceramics

Author(s)

Fraygola, B. ^[1] ; Garcia, D. ^[1] ; Eiras, J. A. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Depto Fis, Grp Ceram Ferroeletr GCFerr, BR-13560 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Ferroelectrics; v. 428, p. 87-93, 2012.
• Web of Science Citations: 3

Abstract

Multiferroic relaxor ceramics Pb(Fe2/3W1/3)O-3 (PFW) has been synthesized by a modified B-site precursor method and characterized by anelastic measurements. Anomalies in the temperature dependence of the elastic constant have been observed at T-N and T-C, indicating that the establishment of ferroelectric and antiferromagnetic orders occurs via linear coupling with lattice strain. In both transitions, FE and AFM, the coupling with the elastic part of the system is linear-quadratic, ie F (S, M) = gSL(2) (L = M-2-M-1) and F (S, P) = beta SP2, justifying the presence of the term in eta(LP2)-P-2 free energy expansion. (AU)

• FAPESP's process: 08/04025-0 - Nanostructured multifunctional multiferroic materials: synthesis, properties, phenomenology and applications
• Grantee: José Antonio Eiras
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 10/11187-6 - Determination of the magnetoelectric coupling coefficient in single phase multiferroic materials
• Grantee: Barbara Maraston Fraygola
• Support Opportunities: Scholarships in Brazil - Post-Doctoral