The magnetic properties of small 4d transition metal clusters are studied i
n the framework of a self-consistent tight-binding Hamiltonian. The role of
the size and symmetry of the structure on the stability of magnetic states
is determined by performing calculations for different geometrical arrange
ments. Our results are in agreement with the existing experimental and theo
retical studies. (C) 1999 Elsevier Science B.V. All rights reserved.