Lattice Disorder and Size-Induced Kondo Behavior in CeAl{sub 2} and CePt{sub 2+x}

Journal Article · Fri Sep 01 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.097204· OSTI ID:20860752

Han, S -W ^[1]; Booth, C H ^[1]; Bauer, E D ^[2]; Huang, P H; Chen, Y Y ^[3]; Lawrence, J M ^[4]

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1. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Institute of Physics, Academia Sinica, Taipei, Taiwan (China)
4. Department of Physics, University of California, Irvine, California 92697 (United States)

When the size of CeAl{sub 2} and CePt{sub 2+x} particles is reduced to the nanometer scale, antiferromagnetism is suppressed and Kondo behavior predominates, with the Kondo temperature T{sub K} either decreasing (CeAl{sub 2}) or increasing (CePt{sub 2+x}) 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{sub K}. Other size-induced changes to the electronic structure must, therefore, play a significant role.

• OSTI ID: 20860752
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ANTIFERROMAGNETISM
BINARY ALLOY SYSTEMS
CERIUM ALLOYS
ELECTRONIC STRUCTURE
KONDO EFFECT
NANOSTRUCTURES
PARTICLES
PLATINUM ALLOYS