Structure, dielectric, vibrational, and optical properties of lead-free double perovskite Bi2FeMnO6

The solid-state reaction technique was executed to form a hexagonal double perovskite Bi 2 FeMnO 6 nanopowder. X-ray diffraction (XRD) analysis gives information regarding the product's average crystallite size of 27.9 nm and lattice strain of 0.00125, respectively. The Ultra-Violet (UV) visibl...

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Bibliographic Details
Published in:Ferroelectrics 2024-01, Vol.618 (1), p.47-62
Main Authors: Tripathy, B. S., Choudhary, R. N. P., Umapathi, Balaji, Nayak, Priyabrata, Parida, S. K.
Format: Article
Language:English
Subjects:
Cole-Cole plots
Conduction
Crystallites
Data analysis
Energy gap
FeMnO
Fourier transforms
Infrared analysis
Infrared spectroscopy
Lattice strain
Lead free
Maxwell-Wanger dispersion
Optical properties
Perovskites
photovoltaic applications
Photovoltaics
Spectroscopy
Vibration analysis
X-ray diffraction
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Summary:The solid-state reaction technique was executed to form a hexagonal double perovskite Bi 2 FeMnO 6 nanopowder. X-ray diffraction (XRD) analysis gives information regarding the product's average crystallite size of 27.9 nm and lattice strain of 0.00125, respectively. The Ultra-Violet (UV) visible spectroscopy data provides a band gap energy of 2.49 eV, which may be a suitable range for photovoltaic applications. Fourier Transform Infrared (FTIR) spectroscopy data analysis reveals the presence of all constituent atomic vibration bands. The dielectric measurements confirmed the presence of the Maxwell-Wanger type of dispersion. The negative temperature coefficient of resistance (NTCR) character is well understood from impedance spectroscopy. The electrical modulus results indicate the presence of a non-Debye-type of relaxation mechanism in the sample. Analyzing ac conductivity data reveals the thermally activated conduction process. The sample's semi-conducting character was confirmed by both Nyquist and Cole-Cole plots.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2023.2271314