Theory of local magnetic moments in transition metals

The authors consider whether a state of disordered local moments (DLM) can exist in an itinerant magnetic metal above T c . They develop a criterion Il(E F )>1 for the non-magnetic state to be unstable with respect to the formation of DLM. This criterion is more easily satisfied than the Stoner criterion for ferromagnetism. In(E F )>1, near the centre of a tight-binding band and less easily satisfied near the band edges. They report calculations on tight-binding d bands of 3d transition metals by means of the recursion method. These suggest that BCC Mn and Fe do possess a DLM state, whilst Cr, FCC Mn and Ni do not. They present a method of calculation of the real part of the Green function by the recursion method.