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The characterrization of high temperature solution-grown single crystals of Pb(Fe1/2Nb1/2)O3

Published in Ferroelectrics. 1981, vol. 37, no. 1, p. 547-550
Abstract Polarization microscope studies on single crystal samples of Pb(Fe1/2Nb1/2)O3 (PFN) have been made. Thin platelets (<60 μ) show large, homogeneous ferroelectrics domains, and optical characterization shows that PFN is trigonal at room temperature and optically negative. Birefringence measurements between 4.2 and 400 K reveal that the transition to the cubic structure takes place at 383 K, in accordance with earlier work, but they also locate a previously undetected structural modification at 354 K, accompanied simultaneously by a reorientation of the index ellipsoid; both transitions manifest themselves by endothermic reactions on heating in DTA experiments. The new phase is very likely monoclinic.
Keywords Ferroelectric domain (in lead iron niobium oxide single crystals)Birefringence (of lead iron niobium oxide single crystals, structure transition in relation to)
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Project FNS: 1980
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BRUNSKILL, Ian Hedley, SCHMID, Hans, TISSOT, Paul. The characterrization of high temperature solution-grown single crystals of Pb(Fe1/2Nb1/2)O3. In: Ferroelectrics, 1981, vol. 37, n° 1, p. 547-550. https://archive-ouverte.unige.ch/unige:30827

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Deposited on : 2013-10-31

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