Structural, optical and magnetic properties of polycrystalline BaTi{sub 1-x}Fe{sub x}O{sub 3} ceramics

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3625235· OSTI ID:22036699

Dang, N V ^[1]; Thanh, T D; Hong, L V; Lam, V D ^[2]; Phan, The-Long ^[3]

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1. Faculty of Physics, College of Science, Thai Nguyen University, Thai Nguyen (Viet Nam)
2. Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi (Viet Nam)
3. BK-21 Physics Program and Department of Physics, Chungbuk National University, Cheongju 361-763 (Korea, Republic of)

Polycrystalline BaTi{sub 1-x}Fe{sub x}O{sub 3} ceramics have been prepared by conventional solid-state reaction. Their structural, optical and magnetic properties are then studied by means of x-ray diffraction (XRD), Raman scattering (RS) and absorption spectrometers, and a physical properties measurement system. Detailed analyses of XRD patterns and RS spectra reveal the phase separation of the tetragonal-hexagonal structure at a threshold concentration of x = 0.005. The increase in the Fe-doping content (x) leads to development of the hexagonal phase. Magnetic measurements prove that many BaTi{sub 1-x}Fe{sub x}O{sub 3} samples exhibit the room-temperature ferromagnetic order, excepting the samples with x = 0.02-0.06. The ferromagnetism depends strongly on concentration of Fe impurities. The nature of this ferromagnetism is discussed by means of the results of structural analyses and optical absorption spectra.

• OSTI ID: 22036699
• Journal Information: Journal of Applied Physics, Vol. 110, Issue 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ABSORPTION
ABSORPTION SPECTRA
BARIUM COMPOUNDS
CERAMICS
CONCENTRATION RATIO
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HEXAGONAL LATTICES
IRON COMPOUNDS
MAGNETIC PROPERTIES
POLYCRYSTALS
RAMAN SPECTRA
SOLIDS
TEMPERATURE RANGE 0273-0400 K
TETRAGONAL LATTICES
TITANATES
X-RAY DIFFRACTION