Anisotropy of heat capacity in Pauli limited unconventional   superconductors
  Diamagnetically coupled magnetic field can be used as a probe of nodal positions in unconventional superconductors. The heat capacity depends on the angle $\phi_0$ between the magnetic field and the nodal directions. We show that the anisotropy $C(\phi_0)$ persists even in systems with strong paramagnetic coupling to the electrons's spins. 
A. Vorontsov, I. Vekhter