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Type: Artigo de periódico
Title: Tuning The Bottleneck Effect In Ag Metallic Host Doped With Magnetic Gd And Non-magnetic Sb Ions
Author: Vargas J.M.
Oseroff S.B.
Rettori C.
Abstract: The Ag metallic host doped with Gd and Sb is an excellent model system to study the bottleneck effect associated to the conduction-electron (c-e) spin-flip scattering mechanism. Electron spin resonance of Gd3 + in both, Ag-(Gd doped)- and Ag-(Gd and Sb doped)-systems, reveal the presence of bottleneck which can be tuned by the amount of Gd and Sb impurities. The increase of the Gd concentration leads to a c-e spin-flip relaxation rate to the magnetic Gd3 + ions larger than that to the lattice, favoring the bottleneck regime. Whereas the effect of the non-magnetic impurities (Sb ions) is to increase, via spin-orbit scattering, the spin-flip relaxation rate of the c-e to the lattice, weakening the bottleneck regime. © 2009 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.physb.2009.06.072
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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