  We have investigated Pd nanowires theoretically, and found that, unlike
either metallic or free atomic Pd, they exhibit Hund's rule magnetism. In long,
monoatomic wires, we find a spin moment of 0.7 Bohr magnetons per atom, whereas
for short, monoatomic wires between bulk leads, the predicted moment is about
0.3 Bohr magnetons per wire atom. In contrast, a coaxial (6,1) wire was found
to be nonmagnetic. The origin of the wire magnetism is analyzed.
