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The Kondo effect in the presence of ferromagnetism.
MedLine Citation:
PMID:  15459383     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We measured Kondo-assisted tunneling via C60 molecules in contact with ferromagnetic nickel electrodes. Kondo correlations persisted despite the presence of ferromagnetism, but the Kondo peak in the differential conductance was split by an amount that decreased (even to zero) as the moments in the two electrodes were turned from parallel to antiparallel alignment. The splitting is too large to be explained by a local magnetic field. However, the voltage, temperature, and magnetic field dependence of the signals agree with predictions for an exchange splitting of the Kondo resonance. The Kondo effect leads to negative values of magnetoresistance, with magnitudes much larger than the Julliere estimate.
Authors:
Abhay N Pasupathy; Radoslaw C Bialczak; Jan Martinek; Jacob E Grose; Luke A K Donev; Paul L McEuen; Daniel C Ralph
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  306     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2004 Oct 
Date Detail:
Created Date:  2004-10-01     Completed Date:  2004-10-25     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  86-9     Citation Subset:  -    
Affiliation:
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY 14853, USA.
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Comment In:
Science. 2004 Oct 1;306(5693):63-4   [PMID:  15459374 ]

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