. 2021 Dec 24;12(2):698–707. doi: 10.1039/d1ra07407e

Hyperfine parameters for Co_xFe_3−xO₄ NPs at 300 K. The fitted values of isomer shift δ (mm s⁻¹), full width at half maximum FWHM (mm s⁻¹), intensity ratio A12, quadrupole splitting ΔE (mm s⁻¹), hyperfine field B_hf (T) and population (I) for respective sub-spectra.

Sample name	Sub-spectra	δ (mm s⁻¹)	FWHM (mm s⁻¹)	A12	ΔE (mm s⁻¹)	B _hf (T)	I (%)
	Doublet	0.3367	0.8599	0.9389	0.7411	0	14.17
S1	A-Fe³⁺	0.3340	0.8736	2.047	0.0009	46.15	12.92
	B-(Fe³⁺–Fe²⁺)	0.3625	2.456	1.956	0.0020	39.68	72.91
	Doublet	0.3944	1.9197	0.5308	1.4498	0	34.08
	A-(Fe³⁺–Co²⁺)	0.3473	0.2716	1.2835	−0.008	49.46	5.47
	A-Fe³⁺	0.3109	0.3040	2.7461	0.0155	48.13	8.15
S2	B-(Fe³⁺–Fe²⁺)	0.3525	0.4355	1.2658	−0.012	46.30	14.31
	B-(Fe³⁺–Co²⁺)	0.3784	0.7620	1.3939	0.0056	43.63	12.04
	B-(Fe²⁺–Co²⁺)	0.3763	1.8978	0.6981	0.0101	39.08	25.95
	Doublet	0.4832	1.9885	0.5569	1.5936	0	23.52
	A-(Fe³⁺–Co²⁺)	0.3938	0.2227	1.3567	−0.0654	49.99	5.56
	A-Fe³⁺	0.3019	0.2401	2.0557	0.0225	48.72	12.25
S3	B-(Fe³⁺–Fe²⁺)	0.3464	0.3917	1.6024	−0.0149	47.22	14.38
	B-(Fe³⁺–Co²⁺)	0.3947	0.5275	1.2813	−0.0040	45.05	16.03
	B-(Fe²⁺–Co²⁺)	0.4619	1.4264	0.9014	0.0372	42.11	28.26
	Doublet	0.3206	0.6592	0.5042	0.6605	0	6.47
	A-(Fe³⁺–Co²⁺)	0.3922	0.2313	1.3284	−0.040	50.05	6.15
S4	A-Fe³⁺	0.3069	0.2427	1.9145	0.0277	48.69	13.52
	B-(Fe³⁺–Fe²⁺)	0.3330	0.3422	1.7244	−0.016	47.26	14.74
	B-(Fe³⁺–Co²⁺)	0.3557	0.4930	1.2233	0.0023	45.24	18.70
	B-(Fe²⁺–Co²⁺)	0.4439	1.3566	0.9227	0.0267	42.33	40.41
	Doublet	0.3254	0.6361	0.5059	0.6284	0	9.26
	A-(Fe³⁺–Co²⁺)	0.4027	0.3609	1.3075	−0.0243	50.09	8.32
S5	A-Fe³⁺	0.3069	0.3296	1.6581	0.0495	48.72	13.10
	B-(Fe³⁺–Fe²⁺)	0.3227	0.4635	1.7180	−0.0166	47.34	21.73
	B-(Fe³⁺–Co²⁺)	0.3368	0.6075	1.1624	0.0035	45.21	26.38
	B-(Fe²⁺–Co²⁺)	0.4151	1.1255	1.1114	0.0208	41.85	21.19
	Doublet	0.3350	0.7452	0.5664	0.6893	0	7.73
	A-(Fe³⁺–Co²⁺)	0.3568	0.3300	1.7885	−0.0057	49.15	10.32
S6	A-Fe³⁺	0.3077	0.3562	1.3862	0.0259	47.38	22.46
	B-(Fe³⁺–Fe²⁺)	0.3234	0.4405	1.6998	−0.0354	45.61	19.64
	B-(Fe³⁺–Co²⁺)	0.3077	0.5567	1.1332	0.0140	43.43	19.45
	B-(Fe²⁺–Co²⁺)	0.3415	1.2473	1.0122	−0.0581	39.99	20.39
	Doublet	0.3465	0.6155	0.5129	0.6390	0	21.25
	A-(Fe³⁺–Co²⁺)	0.3382	0.4639	1.5581	0.0330	47.14	10.49
	A-Fe³⁺	0.3118	0.5094	1.5179	0.0158	45.08	12.85
S7	B-(Fe³⁺–Fe²⁺)	0.3032	0.4870	1.5099	0.0266	43.08	10.93
	B-(Fe³⁺-Co²⁺)	0.3295	0.6831	1.7316	−0.038	40.83	14.19
	B-(Fe²⁺–Co²⁺)	0.3272	1.4377	0.7696	0.0324	37.51	30.27

Hyperfine parameters for CoxFe3−xO4 NPs at 300 K. The fitted values of isomer shift δ (mm s−1), full width at half maximum FWHM (mm s−1), intensity ratio A12, quadrupole splitting ΔE (mm s−1), hyperfine field Bhf (T) and population (I) for respective sub-spectra.

Hyperfine parameters for Co_xFe_3−xO₄ NPs at 300 K. The fitted values of isomer shift δ (mm s⁻¹), full width at half maximum FWHM (mm s⁻¹), intensity ratio A12, quadrupole splitting ΔE (mm s⁻¹), hyperfine field B_hf (T) and population (I) for respective sub-spectra.