E-field induced phase transition in 〈001〉-oriented rhombohedral 0.92Pb(Zn1/3Nb2/3)O3-0.08PbTiO3 crystals

Dong Soo Paik, Seung Eek Park, Satoshi Wada, Shi Fang Liu, Thomas R. Shrout

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Abstract

E-field induced phase transformation and associated changes in dielectric/piezoelectric properties of 〈001〉-oriented rhombohedral 0.92Pb(Zn1/3Nb2/3)O3-0.08PbTiO3 crystals were investigated. The longitudinal strain level was found to abruptly increase at 20 kV/cm, corresponding to that where an induced phase appears within a multidomain matrix. Decreases in the dielectric constant (K 3 T∼4000 to 500), transverse coupling (k 31∼70% to 50%) and transverse piezoelectric coefficient (d 31∼ - 1100 to -200 pC/N) associated with the induced phase were the result of increased crystal anisotropy. By contrast, the thickness coupling (kT) increased from 53% at 0 kV/cm to 64% at 45 kV/cm, associated with this phase transition. The measured dielectric and piezoelectric properties found for the induced phase state were nearly identical to those of 〈001〉 poled tetragonal (1 - x)PZN-xPT (x>0.1) crystals. Based on these results, it is evident that the symmetry of induced phase is tetragonal, 4 mm.

Original languageEnglish (US)
Pages (from-to)1080-1083
Number of pages4
JournalJournal of Applied Physics
Volume85
Issue number2
DOIs
StatePublished - Jan 15 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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