Scientific article

Relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 : Properties and present understanding

ContributorsYe, Zuo-Guang
Published inFerroelectrics, vol. 184, no. 1, p. 193-208
Publication date1996

The relaxor ferroelectric Pb(Mg1/3 Nb2/3 )O3 [PMN] has been extensively studied in the last years. A short overview is presented on various physical models and microstructural features of PMN to understand the peculiar properties of this material. Some important aspects related to the electric field-induced first-order phase transition, from the average cubic phase to a macroscopically ferroelectric 3m phase, are discussed on the basis of an E-T phase diagram. The induced ferroelectric phase transition is characterized by an intrinsic Curie temperature Tco=213 K associated with a threshold field strength Eth=1.75 KV/cm, and a tricritical point at which the first-order transition changes into a second-order. The relationship is discussed between the compositionally non-stoichiometric nanoclusters and the induced polar macrodomain. The mechanism of the induced phase transition can be described as a transformation from nanodomain states to macrodomain states with long-range symmetry breaking, revealing the induced ferroelectric nature of PMN.

Citation (ISO format)
YE, Zuo-Guang. Relaxor ferroelectric Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub> : Properties and present understanding. In: Ferroelectrics, 1996, vol. 184, n° 1, p. 193–208. doi: 10.1080/00150199608230260
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Article (Published version)
ISSN of the journal0015-0193

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