Kondo effect in magnetic tunnel junctions

Authors
Lee, K. I.Joo, S. J.Lee, J. H.Rhie, K.Kim, Tae-SukLee, W. Y.Shin, K. H.Lee, B. C.LeClair, P.Lee, J. -S.Park, J. -H.
Issue Date
2007-03-09
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.98, no.10
Abstract
Tunneling magnetoresistance was found to be suppressed with decreasing temperature for magnetic tunnel junctions (MTJs) oxidized under high plasma power. A strong temperature dependence of the junction resistance was observed, along with zero-bias anomalies of dynamic resistance at low temperatures. Resistance shows a logarithmic dependence on temperature, and resistance versus temperature exhibits a scaling behavior. Our experimental data can be explained in a consistent way by the Kondo effect in the MTJs with the Kondo temperature T-K=20-30 K.
Keywords
DENSITY-OF-STATES; TEMPERATURE-DEPENDENCE; EXCHANGE MODEL; MAGNETORESISTANCE; SCATTERING; TRANSPORT; ANOMALIES; DENSITY-OF-STATES; TEMPERATURE-DEPENDENCE; EXCHANGE MODEL; MAGNETORESISTANCE; SCATTERING; TRANSPORT; ANOMALIES
ISSN
0031-9007
URI
https://pubs.kist.re.kr/handle/201004/134538
DOI
10.1103/PhysRevLett.98.107202
Appears in Collections:
KIST Article > 2007
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