Table 3 Vibrational wavenumbers of samples ν1 & ν2, force constants (F), poisson’s ratio (σ), rigidity modulus (G), bulk modulus (B) and young’s modulus (E).

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

Sample

ν1

ν2

FA

FB

FAV

σ

G

B

E

(cm−1)

(cm−1)

(dyne/cm)

(dyne/cm)

(dyne/cm)

 

(GPa)

(GPa)

(GPa)

MgFe2O4

566.4

405.8

234,579

120,383

177,481

0.159

70.64

97

163.8

MgFe2O4/10% rGO

565.7

405.9

233,992

120,437

177,214

0.154

70.74

96

163.2

MgFe2O4/10%PPy

566.1

407

234,314

121,096

177,705

0.114

70.57

88

157

MgFe2O4/10%

rGO/10%PPy

565.3

405.6

233,686

120,306

176,996

0.099

70.51

86

155

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