The Temperature and Pressure Dependence of the Dielectric Properties of Disordered and Ordered Pb (In_<1/2>Nb_<1/2>)O_3 Single Crystals

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Dielectric properties of' the disordered and ordered Pb(Inj ,zzNbj 73)03 (abbreviated as PIN)single crystals were investigated in the range of terauperature T froraa -70 to 200'C and of' hydro-static pressures p up to 0.7 GP21. For the disordered PIN, a typical dielectric dispersion whichobeys the etnpirical Vogel-Fulcher relation was observed. Strch dielectric dispersion strengthwas weakened with an increase in the degree of' chertaic?tI ordering (S) at the B-site cations inthe perovskite ABO3, and then relaxor behavior disappears. The relaxor lcehavior was alsoweakened with increasing presstrre up to 0.7GPa for the qtrenched disordered PIN with S:0.2,whereas for the disordered PIN with S:0.4, the relaxor behavior xvas weakened with increas-ing pressure and then the antiferroelectric plaase transition was indtrced by the application ofpressure above 0.4 GPa. For the ordered PIN, the phase below the transition tenaperature wasconfirnaed to be antiferroelectric by observation of P-E dotrble hysteresis loops. The stability inthe antiferroelectric phase was enhanced by S and also by the application of presstrre.
社団法人日本物理学会の論文
1998-11-15