Local structure around Fe ions on multiferroic Pb(Fe1/2Nb1/2)O-3 ceramics probed by x-ray absorption spectroscopy

Author(s)

Mesquita, A. ^[1] ; Fraygola, B. M. ^[1] ; Mastelaro, V. R. ^[2] ; Eiras, J. A. ^[1]

Affiliation

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

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Applied Physics Letters; v. 100, n. 17 APR 23 2012.
• Web of Science Citations: 7

Abstract

Local structure around Fe ions on Pb(Fe1/2Nb1/2)O-3 ceramics was probed by x-ray absorption spectroscopy in order to settle the controversies about its structure. It is observed that the shell structure around Fe atoms exhibits a monoclinic local symmetry at 130 and 230 K, tetragonal local symmetry at room temperature, and cubic local symmetry at 410 K. Independently of the coordination, temperature, or symmetry, Fe-O mean bond-length does not vary significantly. (C) 2012 American Institute of Physics. {[}http://dx.doi.org/10.1063/1.4709490] (AU)

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