Partial magnetization reversal using laser annealing in patterned NiFe/FeMn film

Polarized current changes the exchange bias in a current-in-plane spin valve

“…A survey of most of EB experiments on the magnetic field applied during field cooling from above the blocking temperature and thermal decay of EB under a magnetic field antiparallel to the pinning direction reveals that the heat treatment time is almost several tens of minutes [23][24][25]. In addition, laser annealing experiments on NiFe/FeMn films demonstrated that the energy required to reverse the EB was approximately 90-360 J [26,27]. However, the energy generated by the current pulse in our experiment was approximately 0.85-0.21 J, which is much lower than the energy required.…”

“…To date, many other post-deposition strategies have been used for EB tuning, such as electric field control [32][33][34], magnetic field control [35][36][37], ion irradiation [38,39], and laser annealing [26,27]. However, many of these approaches have disadvantages.…”