Single femtosecond pulse switching of ferrimagnetic alloys is an essential
building block for ultrafast spintronics. However the most promising class of
material for ultrafast spintronics showing switching capabilities,
Mn2βRuxβGa Heusler alloys, has barely been investigated theoretically from
an atomistic perspective. Here, we propose an atomistic spin model for the
simulation of single pulse toggle switching of the Heusler alloy Mn2βRuxβGa
for a range of Ru concentrations. The magnetic parameters entering the spin
Hamiltonian are obtained by mapping our computer results to previous
experimental results. We investigate the Ru-concentration dependence of single
pulse toggle switching and find that it is restricted to a range of
concentrations, similar to experimental findings. We expect that our atomistic
model serve to further investigate toggle switching in Mn2βRuxβGa Heusler
alloys for ultrafast spintronics applications.Comment: Submitted to Appl. Phys. Lett. Special Topic: 'Ultrafast and THz
spintronics