Structural and Ferroic Properties of La, Nd, and Dy Doped BiFeO₃ Ceramics

Table 1

Rietveld refined structural parameters of the Bi_0.8RE_0.2FeO₃ samples simulated based on the measured XRD patterns. The error values are presented in the parentheses.

Structure	Cell	Atoms				-factors (%)
Bi0.8La0.2FeO3
R3c; (100%)	= 5.5604 (5)	Bi/La	0.0000	0.0000	0.2724	= 4.89
	= 5.5604 (5)	Fe	0.0000	0.0000	0.0000	= 5.36
	= 13.7596 (6)	O	0.6679	0.7647	0.5489	= 7.15
	= 368.43 (2)					= 2.91
						GoF = 1.7
Bi0.8Nd0.2FeO3
P1; (100%)	= 3.9074 (5)	Bi/Nd	0.0000	0.0000	0.0000	= 10.0
	= 3.9112 (6)	Fe	0.5689	0.4362	0.5467	= 7.79
	= 3.9002 (5)	O1	−0.0815	0.4542	0.6774	= 11.2
	= 59.60 (2)	O2	0.4538	−0.0722	0.6835	= 1.85
		O3	0.4541	0.4756	0.0176	GOF = 1.16
Bi0.8Dy0.2FeO3
Pnma; (80.62%)	= 5.4014 (5)	Bi/Dy	0.0472	0.2500	0.9933	= 10.7
	= 7.7822 (4)	Fe	0.0000	0.0000	0.5000	= 6.96
	= 5.5904 (5)	O1	0.3832	0.2500	0.0818	= 5.62
	= 234.99 (1)	O2	0.2076	0.5414	0.2044	= 7.2
						= 1.85
R3c; (19.38%)	= 5.5504 (2)	Bi/Dy	0.0000	0.0000	0.2676	GOF = 1.4
	= 5.5504 (2)	Fe	0.0000	0.0000	0.0000
	= 13.7888 (5)	O	0.6794	0.7801	0.5544
	= 367.88 (2)