Josephson effect through an anisotropic magnetic molecule
  We study the Josephson effect through a magnetic molecule with anisotropic properties. Performing calculations in the tunneling regime, we show that the exchange coupling between the electron spin on the molecule and the molecular spin can trigger a transition from the $\pi$ state to the 0 state, and we study how the spin anisotropy affects this transition. We show that the behavior of the critical current as a function of an external magnetic field can give access to valuable information about the spin anisotropy of the molecule. 
I. A. Sadovskyy, D. Chevallier, T. Jonckheere, M. Lee, S. Kawabata and   T. Martin
cond-mat.mes-hall