Magnetic enhancement in nanoscale CoRh particles.

Authors :: Zitoun D
Respaud M
Fromen MC
Casanove MJ
Lecante P
Amiens C
Chaudret B
Source :: Physical review letters [Phys Rev Lett] 2002 Jul 15; Vol. 89 (3), pp. 037203. Date of Electronic Publication: 2002 Jun 27.
Publication Year :: 2002
Abstract: The influence of size reduction on the magnetism of CoRh has been studied on a system of isolated nanometric spherical bimetallic ultrafine particles embedded in a polymer matrix. Pulsed fields up to 30 T were used in order to approach the magnetic saturation ( M(S)). Particles with a mean diameter of 1.65 (+/-0.1) nm display a value of 2.38 micro(B) per CoRh unit strongly enhanced compared to values calculated or measured on a bulk alloy. These results were interpreted as the first evidence of the cooperative role of both alloying and size reduction to the enhancement of M(S) in this system associating a 3d FM metal with a 4d metal.