Table 2 Effect of Ca-substitutions on the magnetic properties of a maximum magnetization at 25 kOe (M25kOe), remanence (Mr), intrinsic coercivity (Hc), squareness (Mr/M25kOe), and calculated maximum energy product ((BH)max) for the M-type Sr0.75−xLa0.25CaxFe11.8Co0.2O19 ferrite samples.

From: Anisotropic characteristics and improved magnetic performance of Ca–La–Co-substituted strontium hexaferrite nanomagnets

Ca2+ content (x)

M25kOe (emu/g)

Mr (emu/g)

Hc (Oe)

Mr/M25kOe (%)

(BH)max (Cal.) (MG·Oe)

0.00

71.364

38.233

7035.1

53.6

1.65

0.05

71.862

38.427

7310.9

53.5

1.72

0.10

71.647

38.320

7580.4

53.5

1.84

0.15

72.837

38.688

7745.5

53.1

1.99

0.20

72.647

38.854

7880.4

53.5

2.01

0.25

71.401

38.567

7471.9

54.0

1.79

0.30

69.830

37.429

7415.9

53.6

1.67

0.40

66.886

35.288

7388.6

52.8

1.57

0.60

60.426

31.510

7178.0

52.1

1.13

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