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- Title
Tunable Magnetism of Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> Materials via Fe Defects.
- Authors
Dung, D. D.; Doan, N. B.; Dung, N. Q.; Linh, N. H.; Bac, L. H.; Thanh, L. T. H.; Trung, N. N.; Duc, N. V.; Cuong, L. V.; Thiet, D. V.; Cho, S.
- Abstract
The experimental procedure for the synthesis of undoped Na SB 0.5 sb Bi SB 0.5 sb TiO SB 3 sb and Fe-doped Na SB 0.5 sb Bi SB 0.5 sb TiO SB 3 sb was as follows: First, sodium nitrate, bismuth nitrate pentahydrate, and iron nitrate were completely dissolved in acetic acid and distilled water. The changed Raman spectra frequencies of Fe-doped Na SB 0.5 sb Bi SB 0.5 sb TiO SB 3 sb at the Ti-O band provided solid evidence that Fe is substituted at the Ti site. Therefore, we posited that the room temperature ferromagnetism of Fe-doped Na SB 0.5 sb Bi SB 0.5 sb TiO SB 3 sb compounds resulted from the exchange splitting of transition metal ions at octahedral sites and/or enhancement via oxygen vacancies. To investigate the origin of ferromagnetism in Fe-doped Na SB 0.5 sb Bi SB 0.5 sb TiO SB 3 sb samples, the first principle calculation was performed for Na SB 0.5 sb Bi SB 0.5 sb TiO SB 3 sb and Na SB 0.5 sb Bi SB 0.5 sb Ti SB 0.9375 sb Fe SB 0.0625 sb O SB 3 sb samples.
- Subjects
DIAMAGNETISM; CRYSTAL field theory; MATERIALS; SUPERCONDUCTING quantum interference devices; FRONTIER orbitals; FERROMAGNETISM
- Publication
Journal of Superconductivity & Novel Magnetism, 2019, Vol 32, Issue 10, p3011
- ISSN
1557-1939
- Publication type
Letter
- DOI
10.1007/s10948-019-05163-z