Abstract
The magnetic and dielectric properties were investigated in the hexagonal YMnO3ceramics synthesized by sol-gel method. An antiferromagnetic order about 70 K and a weak ferromagnetic order at 5 K have been detected in YMnO3ceramics. In addition, we observed also the exchange-bias (EB) effect at low temperatures and it may originate from exchange coupling at the interface between ferromagnetic and antiferromagnetic orders for the co-existence of these two orders in some temperature region in hexagonal YMnO3. Furthermore, the dielectric measurements showed two thermally activated relaxation behaviors following the Arrhenius law in 290-430 K and above 500 K in YMnO3ceramics and they can be explained as the dipolar effects associated with the charge carrier hopping between Mn2+and Mn3+and oxygen vacancy, respectively.
Original language | English |
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Pages (from-to) | 7738-7741 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 509 |
Issue number | 29 |
DOIs | |
Publication status | Published - 21 Jul 2011 |
Keywords
- Magnetic and dielectric properties
- YMnO ceramics 3
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry