T. S. Al'tshuler, M. S. Bresler, Yu. V. Goryunov, “Ferromagnetic ordering of iron impurities in the Kondo semiconductor SmB<sub>6</sub>”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2005, Volume 81, Issue 9,Pages <nobr>591

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CONDENSED MATTER

Ferromagnetic ordering of iron impurities in the Kondo semiconductor SmB₆

T. S. Al'tshuler^a, M. S. Bresler^b, Yu. V. Goryunov^a

^a Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences
^b Ioffe Physico-Technical Institute, Russian Academy of Sciences

Abstract: The Kondo semiconductor SmB₆ doped with 1 at. % Fe has been studied by the EPR method. The ferromagnetic ordering of iron ions observed at a relatively high temperature of 100 K is explained by their indirect exchange via the polarization of the SmB₆ matrix, which is enhanced owing to fluctuating-valence ions.

PACS: 71.27.+a, 75.20.Hr, 76.30.-v

Received: 29.03.2005