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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Azam, Siraj |
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| Azevedo, Nuno Monteiro |
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Nawrocik, Wojciech
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Publications (4/4 displayed)
- 2007Phase transitions in ferroelectric pyridinium periodide under high pressurecitations
- 2004High-pressure peculiarities in compositionally ordered Pb(Sc <inf>1/2</inf>Nb<inf>1/2</inf>)O<inf>3</inf>citations
- 2003Effect of hydrostatic pressure on the dielectric response of Pb(Mg 1/3Nb2/3)O3 relaxorcitations
- 20012-5 pyrochlore relaxor ferroelectric Cd<inf>2</inf>Nb<inf>2</inf>O<inf>7</inf> and its Fe<sup>2+</sup>/Fe<sup>3+</sup> modificationscitations
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article
Phase transitions in ferroelectric pyridinium periodide under high pressure
Abstract
<p>The effect of temperature and pressure on physical properties of pyridinium periodide has been studied by dielectric spectroscopy, neutron spectroscopy and NMR. The results obtained by the above methods enable a construction of the p - T phase diagram for this compound. It has been established that the temperature of the non-ferroelectric phase transition increases linearly with pressure, while the temperature of the ferroelectric phase transition reaches a maximum at about 200 MPa. Neutron powder diffraction measurements versus temperature and pressure permitted determination of the thermal expansion coefficient and isothermal compressibility coefficient . The pressure dependence of NMR parameters permitted obtaining the activation volume in phases II and III.</p>