  Measurement of parity violating magnetization is proposed as a means to
determine neutrino properties such as Majorana/Dirac distinction and absolute
neutrino masses. The process we use is radiative neutrino pair emission from a
collective and coherent body of lanthanoid ions doped in host crystals. A
vector-component of electron spin flip parallel to photon direction emitted
from ion excited state generates this type of magnetization which is stored for
a long time in crystals till spin relaxation time.
