  We study the current-induced torques in asymmetric magnetic tunnel junctions
containing a conventional ferromagnet and a magnetic Weyl semimetal contact.
The Weyl semimetal hosts chiral bulk states and topologically protected Fermi
arc surface states which were found to govern the voltage behavior and
efficiency of current-induced torques. We report how bulk chirality dictates
the sign of the non-equilibrium torques acting on the ferromagnet and discuss
the existence of large field-like torques acting on the magnetic Weyl semimetal
which exceeds the theoretical maximum of conventional magnetic tunnel
junctions. The latter are derived from the Fermi arc spin texture and display a
counter-intuitive dependence on the Weyl nodes separation. Our results shed
light on the new physics of multilayered spintronic devices comprising of
magnetic Weyl semimetals, which might open doors for new energy efficient
spintronic devices.
