Synthesis and Characterization of Hollow Magnetic Alloy (GdNi₂, Co₅Gd) Nanospheres Coated with Gd₂O₃

Table 1

SiO2	M(NO3)𝑦·ZH2O (M = Fe, Co, Ni)	Gd(NO3)3·6H2O
1.2 g	0.21 g Fe(NO3)3·9H2O	0.23 g
1.2 g	0.15 g Co(NO3)2·6H2O	0.23 g
1.2 g	0.15 g Ni(NO3)2·6H2O	0.23 g