Table 8.

Room temperature Mössbauer hyperfine parameters for RFe${}_{12-x}$M${}_x$: Hyperfine field ($H_{\mathrm{HF}}$), isomer shift ($\delta$) and quadrupole interaction ($2\epsilon$). $\langle \mathrm{HF}\rangle$ denotes the average of the hyperfine parameters.

	Fe$\left\{8\mathit{i}\right\}$	Fe$\left\{8\mathit{j}\right\}$	Fe$\left\{8\mathit{f}\right\}$	$\langle \mathbf{HF}\rangle$	Ref.
YFe${}_{11}$Ti					[84]
${\mu }_0{H}_{\mathrm{HF}}$(T)	26.8	22.7	20.1	23.2
$\delta$ (mm/s)	−0.09	−0.12	−0.17	−0.13
$2\epsilon$ (mm/s)	0.08	0.07	0.04	0.06
PrFe${}_{11}$Ti					[84]
${\mu }_0{H}_{\mathrm{HF}}$(T)	27.1	23.8	21.8	24.2
$\delta$ (mm/s)	−0.08	−0.10	−0.12	−0.09
$2\epsilon$ (mm/s)	0.09	0.09	0.04	0.08
NdFe${}_{11}$Ti					[105]
${\mu }_0{H}_{\mathrm{HF}}$(T)	32.6	29.6	25.2	28.1
$\delta$ (mm/s)	0.01	−0.02	−0.15	−0.09
$2\epsilon$ (mm/s)	0.03	0.10	0.02	0.08
SmFe${}_{11}$Ti					[25]
${\mu }_0{H}_{\mathrm{HF}}$(T)	27.2	23.5	25.8	28.1
$\delta$ (mm/s)	0.01	−0.02	−0.15	−0.09
$2\epsilon$ (mm/s)	0.03	0.10	0.02	0.08
GdFe${}_{11}$Ti					[86]
${\mu }_0{H}_{\mathrm{HF}}$(T)	26.9	25.1	23.9	25.1
$\delta$ (mm/s)	−0.06	−0.11	−0.13	0.14
$2\epsilon$ (mm/s)	0.05	0.04	0.04	0.04