Spin Moment of SmFe $_{7}$ Observed by Magnetic Compton Scattering

Magnetism of SmFe
₇
was studied by magnetic Compton scattering experiment with the synchrotron radiation along with those of SmFe
x
(
x
= 2, 3) and Sm
₆
Fe
₂₃
. Spin moment and orbital moment for SmFe
₇
were 6.60, and 7.20 mu
B
/f.u., respectively. The magnetic Compton profile revealed that the spin moment of SmFe
₇
compounds consists of negative Sm moment and positive Fe moment. The comparison to other Sm-Fe crystals shows that the spin, orbital, and total moments increase linearly against a Fe/Sm ratio.