  We consider the spherical spin glass model defined by a combination of the
pure 2-spin spherical Sherrington-Kirkpatrick Hamiltonian and the ferromagnetic
Curie-Weiss Hamiltonian. In the large system limit, there is a two-dimensional
phase diagram with respect to the temperature and the coupling strength. The
phase diagram is divided into three regimes; ferromagnetic, paramagnetic, and
spin glass regimes. The fluctuations of the free energy are known in each
regime. In this paper, we study the transition between the ferromagnetic regime
and the paramagnetic regime in a critical scale.
