▎ 摘　　要

The Josephson effect in the superconductor/ferromagnet/superconductor (SFS) graphene Josephson junction is studied using the Dirac Bogoliubov-de Gennes (DBdG) formalism. It is shown that the SFS graphene junction drives 0-pi transition with the increasing of p = h(0)L/v(F)(h) over bar, which captures the effects of both the exchange field and the length of the junction; the spin-down current is dominant. The 0 state is stable for p < p(c) (critical value p(c) approximate to 0.80) and the pi state is stable for p > p(c), where the free energy minima are at phi(g) = 0 and phi(g) = pi, respectively. The coexistence of the 0 and pi states appears in the vicinity of p(c).