| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Czarnecki, Piotr
Adam Mickiewicz University in Poznań
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2022Above-room-temperature ferroelectricity and piezoelectric activity of dimethylglycinium-dimethylglycine chloridecitations
- 2012New ferroelectric: Bis-thiourea pyridinium bromide inclusion compoundcitations
- 2012Structures and phase transitions in a new ferroelectric-pyridinium chlorochromate-studied by X-ray diffraction, DSC and dielectric methodscitations
- 2010The neutron diffraction study, calorimetry and spontaneous polarization of pyridinium perrhenate at 350, 300 and 100Kcitations
- 2009Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound.citations
- 2009Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compoundcitations
- 2008Redetermination of the structure and dielectric properties of bis(thiourea) pyridinium iodide - A new ferroelectric inclusion compoundcitations
- 2007Phase transitions in ferroelectric pyridinium periodide under high pressurecitations
- 2006Structure, phase transitions and dielectric properties of a new inclusion compound of bis-thiourea pyridinium nitrate saltcitations
- 2006Dielectric response of the relaxor ferroelectric Pb(Mg<inf>1/3</inf>Nb <inf>2/3</inf>)O<inf>3</inf> in the nonergodic state after a DC electric field is turned off
- 2005Decoupling of the order-disorder and displacive contributions to the phase transition in NH<inf>4</inf>H(ClH<inf>2</inf>CCOO)<inf>2</inf>citations
- 2005Compositional and pressure effects on the phase transition in ferroelectric NH<inf>4</inf>H(ClH<inf>2</inf>CCOO)<inf>2</inf>
- 2003Effect of hydrostatic pressure on the dielectric response of Pb(Mg 1/3Nb2/3)O3 relaxorcitations
- 2003The neutron diffraction study of pyridinium periodate at 352, 300 and 100 Kcitations
- 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
- 2001Structure and dynamics of ferroelectric pyridinium periodatecitations
- 2000High pressure study of cation dynamics in pyridinium Perchloratecitations
- 2000Structure and dielectric properties of ferroelectric pyridinium perrhenate crystalscitations
Places of action
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article
Compositional and pressure effects on the phase transition in ferroelectric NH<inf>4</inf>H(ClH<inf>2</inf>CCOO)<inf>2</inf>
Abstract
<p>The effects of pressure and of the substitution of Rb<sup>+</sup> for the ammonium cations on the dielectric responce in NH<sub>4</sub>H(ClH <sub>2</sub>CCOO)<sub>2</sub> (AHCA) crystals have been studied using electric permittivity measurements. The transition temperature (T<sub>c</sub>) decreases with the pressure increasing up to 800 MPa and pressure coefficient dT <sub>c</sub>/dp = -1.4* 10<sup>-2</sup> [K/MPa] has been experimentally determined. In mixed crystals with different Rb<sup>+</sup> admixture proportion, T<sub>c</sub> lowers considerably and additional electric permittivity anomaly is clearly evidenced. The results are discussed assuming a model which combines polarizability effects related to the heavy ion units with the pseudospin tunnelling model.</p>