Magnetic and dielectric properties of Aurivillius phase Bi6Fe2Ti3−2xNbxCoxO18 (0 ≤ x ≤ 0.4)
Creators
- 1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)
- 2. High Magnetic Field Laboratory, University of Science and Technology of China, Hefei 230026 (China)
- 3. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031 (China)
Description
We investigate the structural, magnetic, and dielectric properties of Bi6Fe2Ti3−2xNbxCoxO18 (0 ≤ x ≤ 0.4). The room-temperature ferromagnetism is observed in the Nb and Co co-doped samples compared with the paramagnetic behavior in Bi6Fe2Ti3O18. The ferromagnetism in Bi6Fe2Ti3−2xNbxCoxO18 can be understood in terms of spin canting of the antiferromagnetic coupling of the Fe-based and Co-based sublattices via Dzyaloshinsky-Moriya interaction. Moreover, doping Co at Ti sites can significantly enhance the ferromagnetic Curie temperature compared with the substitution of Co for Fe in the Aurivillius compounds. The dielectric loss of Bi6Fe2Ti3−2xNbxCoxO18 (0.1 ≤ x ≤ 0.4) exhibits a relaxation process. The rather large activation energy in the 0.1 ≤ x ≤ 0.3 samples implies that the relaxation process is not due to the thermal motion of oxygen vacancies inside ceramics
Additional details
Identifiers
- DOI
- 10.1063/1.4865422;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 104
- Journal Issue
- 6
- Journal Page Range
- p. 062413-062413.5
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 45104544
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ACTIVATION ENERGY; ANTIFERROMAGNETISM; BISMUTH COMPOUNDS; CERAMICS; COBALT COMPOUNDS; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; COUPLING; CURIE POINT; DIELECTRIC PROPERTIES; DOPED MATERIALS; FERROMAGNETISM; IRON COMPOUNDS; NIOBIUM COMPOUNDS; OXYGEN; PARAMAGNETISM; RELAXATION; RELAXATION LOSSES; SPIN; TEMPERATURE RANGE 0273-0400 K; TITANATES; VACANCIES
- Descriptors DEC
- ANGULAR MOMENTUM; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIMENSIONLESS NUMBERS; ELECTRICAL PROPERTIES; ELEMENTS; ENERGY; ENERGY LOSSES; EVALUATION; LOSSES; MAGNETISM; MATERIALS; NONMETALS; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; POINT DEFECTS; REFRACTORY METAL COMPOUNDS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE
Optional Information
- Notes
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