  A vanadium dioxide VO2 film shows metal-insulator transition (MIT) induced by
changing environmental temperature. We report the temperature dependence of
electromotive force properties generated in VO2/Ni80Fe20 bilayer junctions
under the ferromagnetic resonance (FMR) of the Ni80Fe20 layer. An electromotive
force generated in a VO2/Ni80Fe20 bilayer junction under the FMR showed a small
change across the MIT temperature of the VO2 film, while the VO2 film
resistance drastically changed. This behavior was not only explained with the
temperature dependence of the electromotive force property generated in the
Ni80Fe20 film itself under the FMR, but also with the generated electromotive
forces due to the inverse spin-Hall effect (ISHE) in the VO2 film under the FMR
of the Ni80Fe20 film. That is, we successfully demonstrated the spin injection
from a Ni80Fe20 film into a VO2 film across the MIT temperature of the VO2
film.
