Cation Vacancy-Induced Ferromagnetism in Nanocrystalline CaTiO3 Plate

The nanocrystalline CaTiO 3 plates annealed at 1000 °C for 1 h present room temperature ferromagnetism (FM). The FM almost disappears when annealed at 1000 °C for 12 h. The reduction of FM for the nanocrystalline plates after vacuum annealing suggests that the room temperature FM of CaTiO 3 nanocrys...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 50; no. 11; pp. 1 - 4
Main Authors Sun, Li, Zhang, Yongjia, Ju, Lin, Shi, Changmin, Qin, Hongwei, Hu, Jifan
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2014
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Annealing
Calcium
Couplings
Frequency modulation
Magnetism
Magnetoelectric effects
Powders
Sun
nanocrystals
Magnetic properties
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ISSN0018-9464
1941-0069
DOI10.1109/TMAG.2014.2329714

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Summary:The nanocrystalline CaTiO 3 plates annealed at 1000 °C for 1 h present room temperature ferromagnetism (FM). The FM almost disappears when annealed at 1000 °C for 12 h. The reduction of FM for the nanocrystalline plates after vacuum annealing suggests that the room temperature FM of CaTiO 3 nanocrystalline plate originates from the cation vacancies. The results of the density functional theory calculation show that the stoichiometric CaTiO 3 is nonmagnetic and the neutral Ca vacancy may be responsible for the observed FM in CaTiO 3 . In addition, the magnetodielectric effect is also observed in ferromagnetic CaTiO 3 nanocrystalline plate.
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ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2014.2329714