Disorder and size effects on Kondo interactions and magneticcorrelations in CePt2 nanoscrystals

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The evolution of the Kondo effect and magnetic correlations with size reduction in CePt{sub 2} nanoparticles (3.1-26 nm) is studied by analysis of the temperature-dependent specific heat and magnetic susceptibility. The antiferromagnetic correlations diminish with size reduction. The Kondo effect predominates at small particle size with trivalent, small Kondo temperature (T{sub K}) magnetic regions coexisting with strongly mixed valent, large T{sub K} nonmagnetic regions. We discuss the role of structural disorder, background density of states and the electronic quantum size effect on the results.

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Chen, Y.Y.; Huang, P.H.; Ou, M.N.; Wang, C.R.; Yao, Y.D.; Lee,T.K. et al. December 12, 2006.

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Description

The evolution of the Kondo effect and magnetic correlations with size reduction in CePt{sub 2} nanoparticles (3.1-26 nm) is studied by analysis of the temperature-dependent specific heat and magnetic susceptibility. The antiferromagnetic correlations diminish with size reduction. The Kondo effect predominates at small particle size with trivalent, small Kondo temperature (T{sub K}) magnetic regions coexisting with strongly mixed valent, large T{sub K} nonmagnetic regions. We discuss the role of structural disorder, background density of states and the electronic quantum size effect on the results.

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  • Journal Name: Physical Review Letters; Journal Volume: 98; Related Information: Journal Publication Date: 2007

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  • Report No.: LBNL--62116
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 928377
  • Archival Resource Key: ark:/67531/metadc896910

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  • December 12, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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Chen, Y.Y.; Huang, P.H.; Ou, M.N.; Wang, C.R.; Yao, Y.D.; Lee,T.K. et al. Disorder and size effects on Kondo interactions and magneticcorrelations in CePt2 nanoscrystals, article, December 12, 2006; United States. (digital.library.unt.edu/ark:/67531/metadc896910/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.