Table 1 The lattice parameter a (Å), the average crystallite size R (nm), X-ray density Dx (kg/m3), measured density Dm (kg/m3), porosity P, dislocation density δ (line/m2), lattice strain (ε), LA-A (Å), LB-B, (Å), LA-B (Å).

From: AC measurements and magnetic properties of magnesium ferrite and its composites with reduced graphene oxide (rGO) and polypyrrole (PPy)

Sample

a

R

Dx

Dm

δ × 1014

LA−A

LB−B

LA−B

P%

ε × 10−3

(Å)

(nm)

(kg/m3)

(kg/m3)

(line/m2)

(Å)

(Å)

(Å)

MgFe2O4

8.39

36.58

4497.19

2307.44

7.47

3.6332

2.9665

3.4785

0.48

3.07

MgFe2O4/10% rGO

8.38

40.95

4258.75

2117.72

5.96

3.6298

2.9637

3.4753

0.5

2.746

MgFe2O4/10%PPy

8.4

37.11

4180.85

1587.13

7.25

3.6382

2.9706

3.4833

0.62

3.03

MgFe2O4/10%rGO/

10%PPy

8.38

41.01

4407.79

1477.46

5.94

3.6301

2.9640

3.4756

0.66

2.742

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