Abstract
We have studied the laser-induced high-speed remagnetization and tunneling magnetoresistance (TMR) effects in tunnel magnetic junctions (TMJ). Using magneto-optical investigations, all-optical pump and probe technique, we have studied mechanisms of the laser-induced remagnetization and shown feasibility of the high-speed laser-controlled remagnetization and resistance switching in the TMJ. It is shown that the laser-induced remagnetization is caused by the internal effective magnetic fields of the inverse magneto-optical Faraday effect and the effective magnetic field of s–d-exchange interaction between the laser-induced spin-polarized current and a lattice magnetization together with a laser-induced thermal demagnetization.
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