Lattice disorder and size-induced Kondo behavior in CeAl2 andCePt2+x

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When the particle size of CeAl{sub 2} 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 (CeAl{sub 2}) 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 ... continued below

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Han, S.-W.; Booth, C.H.; Bauer, E.D.; P.H., Huang; Chen, Y.Y. & Lawrence, J.M. March 14, 2006.

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When the particle size of CeAl{sub 2} 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 (CeAl{sub 2}) 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.

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  • Journal Name: Physical Review Letters; Journal Volume: 97; Related Information: Journal Publication Date: 2006

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  • Report No.: LBNL--59846
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1103/PhysRevLett.97.097204 | External Link
  • Office of Scientific & Technical Information Report Number: 894233
  • Archival Resource Key: ark:/67531/metadc880458

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  • March 14, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 29, 2016, 3:03 p.m.

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Han, S.-W.; Booth, C.H.; Bauer, E.D.; P.H., Huang; Chen, Y.Y. & Lawrence, J.M. Lattice disorder and size-induced Kondo behavior in CeAl2 andCePt2+x, article, March 14, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc880458/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.