Preparation by Molten Salt Method and Properties of Cubic Phase BiFeO<sub>3</sub> Magneto-Optical Crystals

Nanxi Lin; Xinpan Yang; Chenjun Xu; Huaqin Wu; Hong Zhang; Naifeng Zhuang; Xiaolin Hu

doi:10.3788/AOS240499

Acta Optica Sinica, Volume. 44, Issue 14, 1416001(2024)

Preparation by Molten Salt Method and Properties of Cubic Phase BiFeO₃ Magneto-Optical Crystals

Nanxi Lin^1、***, Xinpan Yang¹, Chenjun Xu¹, Huaqin Wu¹, Hong Zhang¹, Naifeng Zhuang^2、**, and Xiaolin Hu^2、*

¹Key Laboratory of Non-destructive Testing Technology, Fujian Province University, Fujian Polytechnic Normal University, Fuqing350300, Fujian , China

²College of Chemistry, Fuzhou University, Fuzhou 350108, Fujian , China

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Figures & Tables(11)

$XRD diffraction spectra of Bi1-xSrxFe1-xTixO3 (x=0, 0.1, 0.15, 0.2) crystals. (a) 10°~80°; (b) 38.0°~41.2°$

Fig. 1. XRD diffraction spectra of Bi_1-_xSr_xFe_1-_xTi_xO₃(x=0, 0.1, 0.15, 0.2) crystals. (a) 10°~80°; (b) 38.0°~41.2°

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$XRD diffraction spectra of Bi1-xSrxFeO3 and Bi1-xSrxFe1-xTixO3 crystals. (a) Bi1-xSrxFeO3; (b) Bi1-xSrxFe1-xTixO3$

Fig. 2. XRD diffraction spectra of Bi_1-_xSr_xFeO₃ and Bi_1-_xSr_xFe_1-_xTi_xO₃ crystals. (a) Bi_1-_xSr_xFeO₃; (b) Bi_1-_xSr_xFe_1-_xTi_xO₃

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Fig. 3. Structural refinement spectra of Bi_0.7Sr_0.3FeO₃and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals. (a) Bi_0.7Sr_0.3FeO₃; (b) Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃

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Fig. 4. SEM images of different doped-proportions of bismuth ferrate crystals using the molten salt method at the cooling rate of 3 ℃/h. (a) BiFeO₃; (b) Bi_0.7Sr_0.3FeO₃; (c) Bi_0.6Sr_0.4FeO₃; (d) Bi_0.5Sr_0.5FeO₃; (e) Bi_0.8Sr_0.2Fe_0.8Ti_0.2O₃; (f) Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃; (g) Bi_0.6 Sr_0.4Fe_0.6Ti_0.4O₃; (h) Bi_0.5Sr_0.5Fe_0.5Ti_0.5O₃

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Fig. 5. SEM images of Bi_0.7Sr_0.3FeO₃ crystals grown at different cooling rates. (a) 10 ℃/h; (b) 1 ℃/h; (c) 0.5 ℃/h

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Fig. 6. XPS spectra of Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ cyrstals. (a) Bi 4f; (b) Fe 2p; (c) O 1s

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Fig. 7. Room temperature saturated hysteresis loops of BiFeO₃, Sr∶BiFeO₃, and Sr/Ti∶BiFeO₃ crystals. (a) Hysteresis loops; (b) coercivity

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Fig. 8. MCD spectra of BiFeO₃, Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

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Table 1. Raw material feeding ratios for the growth of BiFeO₃, Bi_1-_xSr_xFeO₃, and Bi_1-_xSr_xFe_1-_xTi_xO₃ crystals by molten salt method

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Table 1. Raw material feeding ratios for the growth of BiFeO₃, Bi_1-_xSr_xFeO₃, and Bi_1-_xSr_xFe_1-_xTi_xO₃ crystals by molten salt method

Serial number	Raw material mole ratio	Target product
BFO	n（Bi₂O₃）∶n（Fe₂O₃）=3.5∶1	BiFeO₃
BSFO3	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）=3.2∶0.6∶1	Bi_0.7Sr_0.3FeO₃
BSFO4	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）=3.1∶0.8∶1	Bi_0.6Sr_0.4FeO₃
BSFO5	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）=3∶1∶1	Bi_0.5Sr_0.5FeO₃
BSFTO2	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）∶n（TiO₂）=2.9∶0.2∶0.4∶0.2	Bi_0.8Sr_0.2Fe_0.8Ti_0.2O₃
BSFTO3	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）∶n（TiO₂）=2.85∶0.3∶0.35∶0.3	Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃
BSFTO4	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）∶n（TiO₂）=2.8∶0.4∶0.3∶0.4	Bi_0.6Sr_0.4Fe_0.6Ti_0.4O₃
BSFTO5	n（Bi₂O₃）∶n（SrCO₃）∶n（Fe₂O₃）∶n（TiO₂）=2.75∶0.5∶0.25∶0.5	Bi_0.5Sr_0.5Fe_0.5Ti_0.5O₃

Table 2. Rietveld refinement data for Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

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Table 2. Rietveld refinement data for Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

Crystal	Bi_0.7Sr_0.3FeO₃	Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃
Space group	Pm $\bar{3}$ m （221）	Pm $\bar{3}$ m （221）
Lattice parameter （a） /Å	3.9517（12）	3.9447（8）
Unite cell volume /Å³	61.71（1）	61.38（21）
Formula unites per unite cell	1	1
R_p /%	6.50	8.26
R_wp /%	8.51	10.05
S	1.1952	1.1035

Table 3. Structural parameters of Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

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Table 3. Structural parameters of Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

Chemical formula	Atom	Wyckoff-site	x	y	z	Occupancy
Bi_0.7Sr_0.3FeO₃	Bi1	1a	0	0	0	0.67
	Sr1	1a	0	0	0	0.33
	Fe1	1b	0.5	0.5	0.5	1.00
	O1	3c	0	0.5	0.5	1.00
Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃	Bi1	1a	0	0	0	0.67
	Sr1	1a	0	0	0	0.33
	Fe1	1b	0.5	0.5	0.5	0.68
	Ti1	1b	0.5	0.5	0.5	0.32
	O1	3c	0	0.5	0.5	1.00

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Nanxi Lin, Xinpan Yang, Chenjun Xu, Huaqin Wu, Hong Zhang, Naifeng Zhuang, Xiaolin Hu. Preparation by Molten Salt Method and Properties of Cubic Phase BiFeO₃ Magneto-Optical Crystals[J]. Acta Optica Sinica, 2024, 44(14): 1416001

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Paper Information

Category: Materials

Received: Jan. 15, 2024

Accepted: Apr. 4, 2024

Published Online: Jul. 4, 2024

The Author Email: Lin Nanxi (lin.nanxi@qq.com), Zhuang Naifeng (nfzhuang@fzu.edu.cn), Hu Xiaolin (linamethyst@fzu.edu.cn)

DOI:10.3788/AOS240499

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laser devices and laser physics

Lasers and Laser Optics

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Table 1. Raw material feeding ratios for the growth of BiFeO3, Bi1-xSrxFeO3, and Bi1-xSrxFe1-xTixO3 crystals by molten salt method

Table 1. Raw material feeding ratios for the growth of BiFeO3, Bi1-xSrxFeO3, and Bi1-xSrxFe1-xTixO3 crystals by molten salt method

Table 2. Rietveld refinement data for Bi0.7Sr0.3FeO3 and Bi0.7Sr0.3Fe0.7Ti0.3O3 crystals

Table 2. Rietveld refinement data for Bi0.7Sr0.3FeO3 and Bi0.7Sr0.3Fe0.7Ti0.3O3 crystals

Table 3. Structural parameters of Bi0.7Sr0.3FeO3 and Bi0.7Sr0.3Fe0.7Ti0.3O3 crystals

Table 3. Structural parameters of Bi0.7Sr0.3FeO3 and Bi0.7Sr0.3Fe0.7Ti0.3O3 crystals

Table 1. Raw material feeding ratios for the growth of BiFeO₃, Bi_1-_xSr_xFeO₃, and Bi_1-_xSr_xFe_1-_xTi_xO₃ crystals by molten salt method

Table 1. Raw material feeding ratios for the growth of BiFeO₃, Bi_1-_xSr_xFeO₃, and Bi_1-_xSr_xFe_1-_xTi_xO₃ crystals by molten salt method

Table 2. Rietveld refinement data for Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

Table 2. Rietveld refinement data for Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

Table 3. Structural parameters of Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals

Table 3. Structural parameters of Bi_0.7Sr_0.3FeO₃ and Bi_0.7Sr_0.3Fe_0.7Ti_0.3O₃ crystals