Abstract
L10-MnGa alloy film is a kind of promising material for application of spintronics device and permanent magnet. In this paper, we prepare the Fe-doped L10-MnGa films on thermal MgO (100) substrates with different annealing temperatures and report magnetic regulation of the off-stoichiometric L10-MnGa thin film by tuning Fe doping amount and annealing temperature. It is found that the 4.6% Fe-doped L10-MnGa film has (001) orientation, large coercivity of 6.14 kOe, high effective anisotropy constant of 9.9 Merg/cc and low saturation magnetization of 482 emu/cc. The film annealed at 500 °C has a maximum magnetic energy product of 9.21 MGOe. The production of tensile strain and the change of interatomic exchange coupling state by Fe doping and annealing temperature enable the L10-MnGa film to apply in many fields. It is noteworthy that there are the different doping results compared to the Pt-doped L10-MnGa film in the previous work. These research results are valuable for the design and application of L10-MnGa film.
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