“Restricted Geometry” Effect on Phase Transitions in KDP, ADP, and CDP Nanocrystals
The dielectric properties of composite materials prepared by the embedding of ferroelectrics potassium dihydrogen phosphate (KDP), cesium dihydrophosphate (CDP), as well as antiferroelectric ammonium dihydrogen phosphate (ADP) into porous glass matrices with an average size of through pores of 7, 46...
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| Veröffentlicht in: | Crystals (Basel) 2019-11, Vol.9 (11), p.593 |
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| creator | Tarnavich, Vladislav V. Sidorkin, Alexander S. Korotkova, Tatiana N. Rysiakiewicz-Pasek, Ewa Korotkov, Leonid N. Popravko, Nadezhda G. |
| description | The dielectric properties of composite materials prepared by the embedding of ferroelectrics potassium dihydrogen phosphate (KDP), cesium dihydrophosphate (CDP), as well as antiferroelectric ammonium dihydrogen phosphate (ADP) into porous glass matrices with an average size of through pores of 7, 46, and 320 nm have been studied. It was found that an increase occurred in the phase transitions temperature (TC) for embedded particles in comparison with corresponding bulk materials. Some possible mechanisms of influence of “restricted geometry” on the Curie temperature are discussed. Estimates of TC shifting as a result of the “pressure effect” caused by elastic stresses in embedded particles as well as the result of bias electric field influence arising due to the piezoelectric effect are made. The possibility of using the tunneling Ising model to explain the experimental results is discussed. |
| doi_str_mv | 10.3390/cryst9110593 |
| format | Article |
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It was found that an increase occurred in the phase transitions temperature (TC) for embedded particles in comparison with corresponding bulk materials. Some possible mechanisms of influence of “restricted geometry” on the Curie temperature are discussed. Estimates of TC shifting as a result of the “pressure effect” caused by elastic stresses in embedded particles as well as the result of bias electric field influence arising due to the piezoelectric effect are made. 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| subjects | Ammonium dihydrogen phosphate Antiferroelectricity Cesium Composite materials Crystals Curie temperature Dielectric properties Electric fields Embedding Ferroelectric materials Geometry Ising model KDP crystals Nanocrystals Phase transitions Piezoelectricity Potassium Potassium phosphates Pressure effects Temperature |
| title | “Restricted Geometry” Effect on Phase Transitions in KDP, ADP, and CDP Nanocrystals |
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