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- Title
Effect of atmosphere annealing on the magnetic and dielectric properties of YMnFeO multiferroic ceramics.
- Authors
Ma, Yan; Wang, Xi; Wang, Zhou; Liu, Hao; Wang, Zhuo; Zou, Qian; Yang, Cheng; Zhang, Zhong; Zeng, Wen
- Abstract
YMnFeO ceramics were annealed in oxygen and nitrogen atmosphere, respectively, and the magnetic and dielectric properties were investigated. The structures of the annealed ceramics were maintained in hexagonal P6cm space group. The magnetic structures of the annealed ceramics were not uniform, and predominantly antiferromagnetic with weak ferromagnetic properties at low temperature was detected. Cluster glass state behavior was observed in the O-annealed ceramics and absent in the N-annealed ceramics, which indicated the weakened ferromagnetic interaction in the latter. This was related to the decreased oxygen content in the N-annealed ceramics. Because of the varied valence distribution of Mn and Fe ions in the ceramics annealed in different atmosphere, the dielectric properties were obviously modified. The dielectric permittivity and dielectric loss were smaller in the O-annealed ceramics, which should be related to the lower content of Mn ions in the mixed-valence structure of Mn ions. These results indicated that the magnetic and dielectric properties of YMnFeO ceramics were strongly dependent on the oxygen vacancy content and the mixed-valence structure of magnetic ions.
- Subjects
DIELECTRIC properties; MAGNETIC properties; CERAMICS; ANNEALING of metals; CRYSTALLOGRAPHY
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 11, p8581
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3531-0