V. A. Ivan'shin, T. O. Litvinova, A. A. Sukhanov, D. A. Sokolov, M. C. Aronson, “Electron spin resonance in the Heusler alloy YbRh$_2$Pb”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2009, Volume 90, Issue 2,Pages <nobr>126

This article is cited in 13 papers

CONDENSED MATTER

Electron spin resonance in the Heusler alloy YbRh$_2$Pb

V. A. Ivan'shin^a, T. O. Litvinova^a, A. A. Sukhanov^b, D. A. Sokolov^c, M. C. Aronson^def

^a Kazan State University
^b Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences
^c Centre for Science at Extreme Conditions The University of Edinburgh
^d Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
^e Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton NY, USA
^f Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120, USA

Abstract: An electron spin resonance (ESR) signal was observed in a concentrated Kondo lattice, Heusler alloy YbRh₂Pb. It is attributed to the combined effect of the 4f local magnetic moments of Yb³⁺ and conduction electrons. It is shown that the significant broadening and disappearance of the ESR line at temperatures above 20 K is caused by the processes of the spin-lattice relaxation of the Yb³⁺ ions through the first excited Stark doublet with an activation energy Δ ≈ 73.5 K. A comparison of the ESR data for YbRh₂Pb and some other undoped intermetallic compounds based on ytterbium, cerium, and europium indicates that hybridized electronic states occurring as the result of hybridization between the localized 4f electrons and the collectivized conduction electrons constitute a fundamentally new source of ESR.

PACS: 71.27.+a, 76.30.-v,78.30.-g

Received: 05.06.2009