Frozen Superparaelectric State of Local Polar Regions in GdMn2O5 and Gd0.8Ce0.2Mn2O5

Autor:	Sanina, V. A., Khannanov, B. Kh., Golovenchits, E. I., Shcheglov, M. P.
Rok vydání:	2018
Předmět:	Condensed Matter - Materials Science 14J60 (Primary) F.2.2 I.2.7
Zdroj:	Phys.Sol.St., 2018, v. 60, No. 3, 537-548
Druh dokumentu:	Working Paper
DOI:	10.1134/S1063783418030289
Popis:	A comparative study of the dielectric properties and electric polarization of multiferroics GdMn2O5 and Gd0.8Ce0.2Mn2O5 has been carried out in the temperature range from 5 up to 300 K. The polarization properties in the ferroelectric state that forms due to a charge ordering and exchange striction have been studied at T less than 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 lager than TC. Such a high-temperature polarization is due to the frozen superparaelectric state of the restricted polar domains. Comment: 26 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1803.02126 Zobrazit plný text záznamu View this record from Arxiv