Fig. 4

(a) XRD of SR, Fe-CSR, and La-Fe-CSR; (b) VSM of Fe-SR and La-Fe-CSR (the inset displays the results of magnetic separation of SR and La-Fe-CSR under an applied magnetic field).

(a) XRD of SR, Fe-CSR, and La-Fe-CSR; (b) VSM of Fe-SR and La-Fe-CSR (the inset displays the results of magnetic separation of SR and La-Fe-CSR under an applied magnetic field).