Sample

Time of milling

(h)

M_s

(emu/g)

M_r

(emu/g)

H_c

(Oe)

γ-Fe₂O₃

0

53

1.4

14

γ-Fe₂O₃/Gd₂O₃

5

37

1.7

27

γ-Fe₂O₃/Gd₂O₃

30

18

2

60