Table 1 List of parameters used for the numerically calculated static and dynamic properties of \(\text {Tb}_{n} \text {Co}_m\) multilayers.

Co magnetic moment (\(\mu _{Co}\))

1.61 \(\mu _B\)

Tb magnetic moment (\(\mu _{Tb}\))

9.34 \(\mu _B\)

Exchange constant Co-Co (\(J_{\text {Co-Co}}\))

5.9 × 10\(^{-21}\) J

Exchange constant Tb-Co (\(J_{\text {Tb-Co}}\))

− 1.0 × 10\(^{-21}\) J

Exchange constant Tb-Tb (\(J_{\text {Tb-Tb}}\))

8.2 × 10\(^{-22}\) J

Uniaxial anisotropy constant (\(d_{i,z}^{Co}\))

3.73 × 10\(^{-23}\) J

Uniaxial anisotropy constant (\(d_{i,z}^{Tb}\))

2.16 × 10\(^{-22}\) J

Heat capacity of phonons \(C_p\)

3.0 × 10\(^{6}\) \(\text {Jm}^{-3} \text {K}^{-2}\)

Coupling parameter G

17.0 × 10\(^{17}\) \(\text {Jm}^{-3} \text {K}^{-1}\)

Heat capacity of electrons \(C_e\) (at RT)

2.1 × 10\(^{5} \text {Jm}^{-3} \text {K}^{-1}\)

Characteristic time \(t_0\)

10 ps

Damping parameter \(\lambda \)

0.03 and 0.05

Laser intensity \(I_0\)

3.0 × 10\(^{-19}\) \(\text {m}^{-1} \text {s}^{-1}\)