Spin Injection as a Source of the Metamagnetic Phase Transition
We consider a metamagnetic phase transition of itinerant electrons in the metamagnetic- ferromagnetic metal junction. The current flow between a ferromagnetic metal and a metamagnetic metal produces the non-equilibrium spin imbalance acting as an effective magnetic field and initiating the first-order type transition from low- to high-magnetization states of the metamagnet in the vicinity of the ferromagnet. We show that the current dependence of the length of high-magnetization state region diverges at some threshold value, due to nonequilibrium shift, generated in a contact between the high and low magnetization states of the metamagnetic metal.
A.A. Zyuzin and A.Y. Zyuzin, "Spin Injection as a Source of the Metamagnetic Phase Transition", Solid State Phenomena, Vols. 168-169, pp. 461-464, 2011