
75Maxwell-Wagner Relaxaon in ME Composites
p
ε
33
=
p
ε - i
p
g/ω,
m
ε
33
=
m
ε - i
m
g/ω; (2.77)
where
p
g and
m
g are the conductivities of the piezoelectric and
magnetostrictive phases; and ω the circular frequency, where
the frequency is less than that of electromechanical resonance. The
effective parameters of the composite can be then determined by
assume that the component phase layers are thin and arranged
in the plane OX
1
X
2
; that the piezoelectric component is polarized
along the OX
3
...