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

Figure 6

Room-temperature (300 K) magnetic hysteresis loops of GdNi₂@Gd₂O₃, Fe₃O₄@Gd₂O₃, and Co₅Gd @Gd₂O₃ hollow spheres, respectively. The upper left inset of (a) shows GdNi₂@Gd₂O₃ hollow spheres suspended in water and separated from solution under an external magnetic field and the lower right shows close-up of the central region of the magnetization curves. The inset of (b) shows the highlight of low field region.

(a)

(b)

(c)