  The low temperature monoclinic, insulating phase of vanadium dioxide is
ordinarily considered nonmagnetic, with dimerized vanadium atoms forming spin
singlets, though paramagnetic response is seen at low temperatures. We find a
nonlocal spin Seebeck signal in VO2 films that appears below 30 K and which
increases with decreasing temperature. The spin Seebeck response has a
non-hysteretic dependence on in-plane external magnetic field. This
paramagnetic spin Seebeck response is discussed in terms of prior findings on
paramagnetic spin Seebeck effects and expected magnetic excitations of the
monoclinic ground state.
