Magnetic and optical properties of Fe -doped BaTiO3 materials at the structural phase boundary

Authors

  • Nguyen Thi Ngoc Mai Trường Đại học Khoa học – Đại học Thái Nguyên
  • Nguyen Chi Huy Trường Đại học Khoa học – Đại học Thái Nguyên
  • Lai Thi Hai Hau Trường Đại học Khoa học – Đại học Thái Nguyên
  • Nguyen Van Dang Trường Đại học Khoa học – Đại học Thái Nguyên

DOI:

https://doi.org/10.51453/2354-1431/2018/237

Keywords:

Fe-BaTiO3, Multiferroics, Absorption, Photoluminescence, Opto-magnetic properties.

Abstract

Multiferroic BaTi1-xFexO3 (0,0 ≤ x ≤ 0,18) materials were synthesized by the solid-state reaction method. The influence of Fe substitution for Ti on the crystalline structure and opto-magnetic property of BaTi1-xFexO3 samples was investigated. The results revealed that, the structure of the material sensitively depended on Fe dopant content, x, and transformed gradually from the tetragonal (P4mm) phase to the hexagonal (P63/mmc). The presence of Fe impurity levels combined with the complex levels due to lack of oxygen defects and lattice defects created overlapping lattice, expanded the absorption band and provided the absorption edge toward longer wavelength. We also point out that Fe3+ and Fe4+ ions substitute for Ti4+ and prefer locating in the tetragonal and hexagonal BaTiO3 structures, respectively. It seems that, ferromagnetism in BaTi1-xFexO3 is related to lattice defects and/or exchange interactions between Fe3+ and Fe4+ ions.

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References

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Published

2021-04-07

How to Cite

Nguyễn Thị Ngọc, M., Nguyễn Chí, H., Lại Thị Hải, H., & Nguyễn Văn, Đăng. (2021). Magnetic and optical properties of Fe -doped BaTiO3 materials at the structural phase boundary. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, 4(8), 55–60. https://doi.org/10.51453/2354-1431/2018/237

Issue

Vol. 4 No. 8 (2018): No. 8, JUNE-2018

Section

Natural Science and Technology

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