Using a Hamiltonian formulation of Composite Fermions that I recently developed with R. Shankar, I compute the dependence of the spin polarization on the temperature for the translationally invariant fractional quantum Hall states at $\nu=1/3$ and $\nu=2/5$. I compare my results to experiments at $\nu=1/3$ and find reasonably good agreement.
Temperature dependence of spin polarization in ferromagnetic metals using lateral spin valves
Spin polarization and transition from metallic to insulating behavior in 2D systems
Theoretical basis for the unification of the integer and the fractional quantum Hall effects
