Effects of Ferromagnetic Magnetic Ordering and Phase Transition on the Resistivity of Spin Current

K. Akabli (1) , H. T. Diep (1)

1 LPTM - UMR 8089 - Laboratoire de Physique Théorique et Modélisation

It has been shown experimentally a long time ago that the magnetic ordering causes an anomalous behavior of the electron resistivity in ferromagnetic crystals. Phenomenological explanations based on the interaction between itinerant electron spins and lattice spins have been suggested to explain these observations. We show by extensive Monte Carlo simulation that this behavior is also observed for the resistivity of the spin current calculated as a function of temperature ($T$) from low-$T$ ordered phase to high-$T$ paramagnetic phase in a ferromagnet. We show in particular that across the critical region, the spin resistivity undergoes a huge peak. The origin of this peak is shown to stem from the formation of magnetic domains near the phase transition. The behavior of the resistivity obtained here is compared to experiments and theories. A good agreement is observed.

Mots clés: Spin Transport; Magnetic Resistivity; Monte Carlo Simulation

Domaines: Science des matériaux [cond-mat.mtrl-sci]

K. Akabli, H. T. Diep. Effects of Ferromagnetic Magnetic Ordering and Phase Transition on the Resistivity of Spin Current. 2007. ⟨hal-00184766⟩