A phenomenological thermodynamic potential for potassium niobate
Journal Article
·
· Applied Physics Letters, 94(7):Article Number: 072904
A phenomenological thermodynamic potential in form of an eight-order polynomial of the Landau-Ginsburg-Devonshire (LGD) expansion has been determined for a bulk potassium niobate (KNbO3) single crystal. Such potential is tested by calculating the structural and ferroelectric properties including polarizations, dielectric constants, lattice constants, and phase transition temperatures as well as their shifts under the hydrostatic pressure. The fitted LGD energy expansion coefficients can be used in the phase-field model to explain and predict ferroelectric properties of the bulk and thin film KNbO3.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 953788
- Report Number(s):
- PNNL-SA-64607
- Journal Information:
- Applied Physics Letters, 94(7):Article Number: 072904, Journal Name: Applied Physics Letters, 94(7):Article Number: 072904 Journal Issue: 7 Vol. 94; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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