Frozen Superparaelectric State of Local Polar Regions in GdMn2O5 and Gd0.8Ce0.2MnO5
| Autor: | V. A. Sanina, M. P. Shcheglov, E. I. Golovenchits, B. Kh. Khannanov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Condensed matter physics Solid-state physics 02 engineering and technology Dielectric Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics Polarization (waves) 01 natural sciences Ferroelectricity Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Charge ordering Polarization density 0103 physical sciences Multiferroics 010306 general physics 0210 nano-technology |
| Zdroj: | Physics of the Solid State. 60:537-548 |
| ISSN: | 1090-6460 1063-7834 |
| Popis: | A comparative study of the dielectric properties and electric polarization of multiferroics GdMn2O5 and Gd0.8Ce0.2MnO5 has been carried out in the temperature range 5–330 K. The polarization properties in the ferroelectric state that forms due to a charge ordering and exchange striction have been studied at T ≤ TC = 30 K. The properties of the restricted polar phase separation domains formed in the crystals containing ions Mn3+ and Mn4+ have been studied, too. These domains exhibit the electric polarization in the temperature range from 5 K to some temperatures Tf ≫ TC. Such a high-temperature polarization is due to the frozen superparaelectric state of the restricted polar domains. |
| Databáze: | OpenAIRE |
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