Journal
PHYSICAL REVIEW B
Volume 83, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.224110
Keywords
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Funding
- National Science Foundation (Materials World Network) [DMR-0806592]
- Department of Energy [DE-FG02-07ER46480]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [806592] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-07ER46480] Funding Source: U.S. Department of Energy (DOE)
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The structure, ferroelectric and piezoelectric properties of < 001 > textured (K0.5Na0.5)(0.98)Li0.02NbO3 ceramics were investigated as a function of temperature and dc bias E. X-ray diffraction revealed an orthorhombic (O) -> tetragonal (T) polymorphic phase boundary (PPB). Phase coexistence was found near the PPB over a 30 degrees C temperature range, where the relative phase volume fractions changed with temperature. Furthermore, increasing E applied along the < 001 > texture direction resulted in a notable increase in the volume fraction of the T phase at the expense of the O phase, effectively shifting the O -> T boundary to lower temperature. An enhancement in the piezoelectric properties was found to accompany this increase in the T volume fraction.
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