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Magnetic ordering in relaxor ferroelectric (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3 single crystals

Published online by Cambridge University Press:  31 January 2011

Li Feng ,
Haiyan Guo  and
Zuo-Guang Ye
Li Feng
Affiliation:
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
Haiyan Guo
Affiliation:
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
Zuo-Guang Ye*
Affiliation:
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Single crystals of the perovskite solid solution (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3, with x = 0, 0.07, 0.27, and 0.75, have been synthesized by the high-temperature solution growth using PbO as flux and characterized by x-ray diffraction and dielectric and magnetic measurements. The crystal structure at room temperature changes from a pseudocubic to a tetragonal phase with the PbTiO3 (PT) content increasing to x ⩾ 0.27. As the amount of PT increases, the relaxor ferroelectric behavior of Pb(Fe2/3W1/3)O3 (PFW) is transformed toward a normal ferroelectric state with sharp and nondispersive peaks of dielectric permittivity at TC. Two types of magnetic orderings are observed on the temperature dependence of the magnetization in the crystals with x ⩽ 0.27. This behavior is explained based on the relationships among the magnetic ordering, perovskite structure, composition, and relaxor ferroelectric properties. Furthermore, the macroscopic magnetization of the system was measured under the application of a magnetic field, which demonstrates different magnetic behavior associated with the weakly ferromagnetic, antiferromagnetic, and paramagnetic ordering in the temperature range of 2 to 390 K. Interestingly, the low-temperature ferromagnetism is enhanced by the addition of ferroelectric PT up to x = 0.27.

Keywords

Crystal growthFerroelectricityMagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2116 - 2124
Copyright
Copyright © Materials Research Society 2007

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