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Lattice disorder and size-induced Kondo behavior in CeAl2 andCePt2+x [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
When the particle size of CeAlâ‚‚ and CePt{sub 2+x} samples is reduced to the nanometer scale, antiferromagnetism is suppressed and Kondo behavior dominates. We find that the Kondo temperature T{sub K} can either decrease (CeAlâ‚‚) or increase (CePt{sub 2+x}) in the nanoparticles relative to the bulk. Extended x-ray absorption fine-structure data show that the Ce-Al and Ce-Pt environments are significantly distorted in the nanoparticles. While such distortions should strongly affect magnetic and electronic properties, we find they cannot explain the observed changes in T{sub K}. Changes in the conduction density of states or other parameters must, therefore, play a significant role.
Report Numbers:
E 1.99:lbnl--59846
lbnl--59846
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Note:
Published through SciTech Connect.
03/14/2006.
"lbnl--59846"
Physical Review Letters 97 ISSN 0031-9007; PRLTAO FT
Bauer, E.D.; Lawrence, J.M.; Chen, Y.Y.; Han, S.-W.; Booth, C.H.; Huang P.H.
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Funding Information:
DE-AC02-05CH11231
365723
View MARC record | catkey: 14061881