  The compound, Nd7Rh3, crystallizing in Th7Fe3-type hexagonal structure, was
previously known to exhibit two magnetic transitions, one at 32 K and the other
at 10 K (in zero magnetic field). Here, we report the existence of a
field-induced first-order antiferromagnetic to ferromagnetic transition at 1.8
K in this compound. On the basis of the measurements of isothermal
magnetization and magnetoresistance, we provide evidence for the occurence of
kinetic-hindrance, proposed in the literature, resulting in phase co-existence
(super-cooled ferromagnetic + antifferomagnetic) and percolative electrical
conduction in this stoichiometric intermetallic compound. A point of emphasis,
as inferred from ac susceptibility data, is that such a co-existing phase is
different from spin-glasses, thereby clarifying a question raised in the field
of phase-separation.
