  A theoretical study of the specific heat C(T) as a function of temperature in
Fibonacci magnetic superlattices is presented. We consider quasiperiodic
structures composed of ferromagnetic films, each described by the Heisenberg
model, with biquadratic and bilinear coupling between them. We have taken the
ratios between the biquadratic and bilinear exchange terms according to
experimental data recently measured for different regions of their regime.
Although some previous properties of the spin wave specific heat are also
reproduced here, new features appear in this case, the most important of them
being an interesting broken-symmetry related to the interlayer biquadratic
term.
