ABSTRACT
In this chapter, the author shows the results on the spin resistivity in magnetically ordered materials obtained by Monte Carlo simulations. He discusses its behavior as a function of temperature in various types of crystal: ferromagnetic, antiferromagnetic and frustrated spin systems. As for frustrated spin systems with strong first-order transition, the spin resistivity shows a discontinuity at the phase transition. Experiments have been performed in many magnetic materials including metals, semiconductors and superconductors. One interesting aspect of magnetic materials is the existence of a magnetic phase transition from a magnetically ordered phase to the paramagnetic (disordered) state. Very recent experiments such as those performed on the following compounds show different forms of anomaly of the magnetic resistivity at the magnetic phase transition temperature. Several kinds of materials such as metals, semiconductors, insulating magnetic materials, etc., can be studied with this model, provided an appropriate choice of the parameters.
