Lattice Disorder and Size-Induced Kondo Behavior inCeAl2andCePt2+x

S.-W. Han, C. H. Booth, E. D. Bauer, P. H. Huang, Y. Y. Chen, J. M. Lawrence
2006 Physical Review Letters  
When the size of CeAl 2 and CePt 2x particles is reduced to the nanometer scale, antiferromagnetism is suppressed and Kondo behavior predominates, with the Kondo temperature T K either decreasing (CeAl 2 ) or increasing (CePt 2x ) relative to the bulk. Local structure measurements show that these nanoparticles are significantly distorted. While such distortions should strongly affect magnetic and electronic properties, we find they cannot explain the observed changes in T K . Other size-induced
more » ... changes to the electronic structure must, therefore, play a significant role. a 6=7th of N are Ce, 1=7th are Pt, R constrained to the same value, 2 's constrained by the ratio of the reduced masses.
doi:10.1103/physrevlett.97.097204 pmid:17026397 fatcat:crxppkshojhyzebqftw3y6ikxu