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2010 | 118 | 5 | 931-932
Article title

Magnetic Field Enhancement of the Hall Effect in Dilute Magnetic System La_{1 - x}Ce_{x}B_6 (x ≤ 0.1)

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Abstracts
EN
Magnetic field dependences of the Hall coefficient R_{H} and resistivity have been studied in detail for dilute magnetic compounds La_{1-x}Ce_{x}B_6 (x ≤ 0.1) at temperatures 1.8-300 K. It was established that the regime of weak localization of charge carriers, which was observed in these heavy fermion systems below 30 K destroys gradually in magnetic field up to 8 T. Moreover, in addition to the strong negative magnetoresistance (Δρ/ρ ≈ 80%) a drastic enhancement of the negative Hall coefficient in magnetic field (Δ R_{H}/R_{H} ≈ 50%) has been deduced at liquid helium temperatures. The results of comprehensive analysis contradict the predictions of Kondo-impurity approach for this archetypal strongly correlated electron system in the dilute impurity limit. An alternative interpretation of La_{1-x}Ce_{x}B_6 properties is developed on the basis of spin-polaron approach, Pauli paramagnetism and the density of states renormalization effects at low temperatures.
Keywords
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Contributors
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov Str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov Str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov Str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov Str., Moscow, 119991, Russia
  • Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky Str., 03680 Kiev, Ukraine
author
  • Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky Str., 03680 Kiev, Ukraine
author
  • Centre of Low Temperature Physics, IEP SAS and IPS FS UPJS, 04001 Košice, Slovakia
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n5087kz
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