Kondo effect in magnetic tunnel junctions
- Authors
- Lee, K. I.; Joo, S. J.; Lee, J. H.; Rhie, K.; Kim, Tae-Suk; Lee, 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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