Sample

Ni_1-xCu_xFe₂O₄

Lattice constant a (Å)

Average

Crystallite size D (nm)

M_s

(emu/g)

M_r

(emu/g)

H_c

Oe

x = 0.0

8.3187

20.9

47.0

14.9

172.2

x = 0.3

8.3223

23.4

45.1

14.3

169.0

x = 0.5

8.3344

24.1

40.3

13.0

165.3

x = 0.7

8.3525

20.4

34.8

11.8

189.4

x = 1.0

8.3856

19.7

31.8

14.9

723.9