  The phenomenon of ferrimagnetic spin wave resonance [uncompensated
antiferromagnetic spin wave resonance] has been detected for the first time. It
has been observed in carbon nanotubes, produced by high energy ion beam
modification of diamond single crystals in $\ <{100}\ >$ direction.
Peculiarities of spin wave resonance observed allow to insist on the formation
in given nanotubes of $s^+$ superconductivity at room temperature, coexisting
with uncompensated antiferromagnetic ordering.
