<abstract xmlns="http://www.w3.org/1999/xhtml">

This work reported the successful synthesis of ilmenite-spinel (1 − <italic>x</italic>)NiTiO3-<italic>x</italic>MnFe2O4 (<italic>x</italic> = 0, 0.05 and 0.10) composites by a simple sol-gel method. Phase formation of composites was analyzed by the X-ray diffraction method. All the synthesized samples formed diphasic ilmenite-ferrite composites without any trace of impurity or intermediate phase. The optical properties of synthesized composites were characterized by diffuse reflectance UV–visible spectroscopy. MnFe2O4 phase modified the optical band gap of NiTiO3 material and shifted its optical bandgap value toward lower energy. Ferroelectric and magnetic hysteresis loops were investigated at room temperature. The hysteresis loops indicated the typical ferromagnetic and ferroelectric nature of all composites at room temperature. In P-E loops, the remanent polarization (<italic>Pr</italic>) and saturation polarization (<italic>Ps</italic>) showed a slight increase in the sample with 5% MnFe2O4 phase addition. However, the lossy <italic>P-E</italic> loop was observed in the sample with the addition of 10% MnFe2O4. The presence of ferrite MnFe2O4 phase in NiTiO3 material enhanced the magnetic properties of NiTiO3 at room temperature. The <italic>M-H</italic> loops of NiTiO3-MnFe2O4 composites presented a ferromagnetic behavior with a dramatic increase in saturation magnetization with an increase of ferrite phase addition.
</abstract>

This work reported the successful synthesis of ilmenite-spinel (1 − x)NiTiO3-xMnFe2O4 (x = 0, 0.05 and 0.10) composites by a simple sol-gel method. Phase formation of composites was analyzed by the X-ray diffraction method. All the synthesized samples formed diphasic ilmenite-ferrite composites without any trace of impurity or intermediate phase. The optical properties of synthesized composites were characterized by diffuse reflectance UV–visible spectroscopy. MnFe2O4 phase modified the optical band gap of NiTiO3 material and shifted its optical bandgap value toward lower energy. Ferroelectric and magnetic hysteresis loops were investigated at room temperature. The hysteresis loops indicated the typical ferromagnetic and ferroelectric nature of all composites at room temperature. In P-E loops, the remanent polarization (Pr) and saturation polarization (Ps) showed a slight increase in the sample with 5% MnFe2O4 phase addition. However, the lossy P-E loop was observed in the sample with the addition of 10% MnFe2O4. The presence of ferrite MnFe2O4 phase in NiTiO3 material enhanced the magnetic properties of NiTiO3 at room temperature. The M-H loops of NiTiO3-MnFe2O4 composites presented a ferromagnetic behavior with a dramatic increase in saturation magnetization with an increase of ferrite phase addition.

NiTiO3/MnFe2O4 ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Ha Noi University of Science and Technology

School of Materials Science and Engineering

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

NiTiO/MnFeO ferrite composites: synthesis, optical, ferroelectric and magnetic properties

This work reported the successful synthesis of ilmenite-spinel (1 − x)NiTiO3-xMnFe2O4 (x = 0, 0.05 and 0.10) composites by a simple sol-gel method. Phase...

Samples	Magnetic Saturation (emu/g)	Remanent magnetization (emu/g)	Coercivity (Oe)	Remanent Ratio M_r/M_s
0	0.005	0.0001	70	0.02
x = 5%	0.691	0.174	135	0.252
x = 10%	1.283	0.417	150	0.325

Sample	Lattice parameters			Unit cell volume (Å³)		Crystalline size (nm)		R_wp %

	NTO		MFO	NTO phase	MFO phase	NTO phase	MFO phase
	a (Å)	c (Å)	a (Å)	NTO phase	MFO phase	NTO phase	MFO phase
NTO	5.0284	13.7912	–	301.98	–	35	–	17.6
NTO-5MFO	5.0285	13.7916	8.3373	302.00	579.53	37	26	18.7
NTO-10MFO	5.0343	13.8074	8.3341	303.04	578.86	38	27	18.3

NiTiO₃/MnFe₂O₄ ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Published Online: Mar 24, 2023

Page range: 43 - 53

Received: Dec 03, 2022

Accepted: Jan 31, 2023

DOI: https://doi.org/10.2478/msp-2022-0045

Keywords
Sol-gel processes, NiTiO, MnFeO, composites, ferroelectric properties, magnetic properties

© 2022 Dang Thi Thom et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Magnetic parameters of (1 − x)NiTiO3-xMnFe2O4 composites

Lattice parameters and crystalline size of (1 − x)NiTiO3-xMnFe2O4 composites

NiTiO3/MnFe2O4 ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Published Online: Mar 24, 2023

Page range: 43 - 53

Received: Dec 03, 2022

Accepted: Jan 31, 2023

DOI: https://doi.org/10.2478/msp-2022-0045

KeywordsSol-gel processes, NiTiO, MnFeO, composites, ferroelectric properties, magnetic properties

© 2022 Dang Thi Thom et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Magnetic parameters of (1 − x)NiTiO3-xMnFe2O4 composites

Lattice parameters and crystalline size of (1 − x)NiTiO3-xMnFe2O4 composites

NiTiO₃/MnFe₂O₄ ferrite composites: synthesis, optical, ferroelectric and magnetic properties

Keywords
Sol-gel processes, NiTiO, MnFeO, composites, ferroelectric properties, magnetic properties