The measured melting curve Tm​(ν) between the crystal and liquid phases
is analyzed using thermodynamics to extract the change of magnetization ΔM as a function of the Landau level filling factor \ ν, near ν=1. \ An
explanation of ΔM(ν) is proposed \ in terms of Skyrmions. \ Near
ν=3, a Wigner crystal is the most probable solid phase, experiments
excluding Skyrmions.Comment: 5 pages, 4 figure