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Author: eric cockayne

Displaying records 11 to 20 of 49 records.
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11. Effects of Vacancies on Properties of Relaxor Ferroelectrics: A First-Principles Study
Published: 2/13/2007
Authors: L Bellaiche, Jorge Iniguez, Eric J Cockayne, Benjamin P Burton
Abstract: A first-principles-based model is developed to investigate the influence of lead vacancies on the properties of relaxor ferroelectric Pb(Sc1/2Nb1/2)O3 (PSN). Lead vacancies generate large, inhomogeneous, electric fields that reduce barriers between ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850976

12. Influence of Oxygen Vacancies on the Dielectric Properties of Hafnia
Published: 1/22/2007
Author: Eric J Cockayne
Abstract: First-principles calculations were used to study the effects of neutral and 2+ charged oxygen vacancies on the dielectric properties of crystalline HfO2. In agreement with previous results, the neutral vacancy is more stable on the 4-fold coordinate ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850980

13. Effects of Vacancies on the Properties of Disordered Ferroelectrics: A First-Principles Study
Published: 1/1/2007
Authors: L Bellaiche, Jorge Iniguez, Eric J Cockayne, Benjamin P Burton
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854310

14. Wake Fields in the Electron Gas, Including Transverse Response
Published: 12/1/2006
Authors: Eric J Cockayne, Zachary H Levine
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854181

15. Origin of the Relaxtor State in Pb(BxB'1-x)O3 Perovskites
Published: 9/29/2006
Authors: Silvia Tinte, Benjamin P Burton, Eric J Cockayne, U V Waghmare
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854306

16. Local Structures and Raman Spectra in the Ca(Zr,Ti)O^d3^ Perovskite Solid Solutions
Published: 2/7/2006
Authors: Igor Levin, Eric J Cockayne, M W Lufaso, Joseph C Woicik, James E Maslar
Abstract: Local structures and cation distributions in perovskite Ca(Zr, Ti)O3 solid solutions were analyzed using X-ray absorption fine structure and pair-distribution functions obtained from total neutron scattering. The analyses revealed that the Zr-O and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850910

17. First Principles Based Simulations of Relaxor Ferroelectrics
Published: 2/1/2006
Authors: Benjamin P Burton, Eric J Cockayne, Silvia Tinte, U V Waghmare
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854182

18. Wake Fields in the Electron Gas Including Transverse Response
Published: 1/19/2006
Authors: Eric J Cockayne, Zachary H Levine
Abstract: Relativistic electrons have transverse electric fields comparable in magnitude to the longitudinal fields. We determine the relative effects of transverse and longitudinal fields of a moving point charge on the dielectric response of a uniform elect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850908

19. First Principles Based Simulations of Relaxor Ferroelectrics
Published: 1/16/2006
Authors: Benjamin P Burton, Eric J Cockayne, Silvia Tinte, U Waghmare
Abstract: The phenomenology of Pb(B,B$ {\prime}$)O$_{3}$, perovskite based relaxor ferroelectrics is reviewed, with emphasis on the relationship between chemical short-range order and the formation of polar nanoregions in the temperature range between the free ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850911

20. Generation of Lattice Wannier Functions via Maximum Localization
Published: 3/1/2005
Author: Eric J Cockayne
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854239



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