Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/101645
Type: Artigo de evento
Title: Magnetic Properties Of U(ga1-xmx)2 With M = Cu, Al And Ge
Author: Da Silva L.M.
Gandra F.G.
Rojas D.P.
Cardoso L.P.
Medina A.N.
Abstract: We report on magnetization measurements on U(Ga1-xMx)2, M = Cu, Ge and Al, with 0≤x≤0.2. All studied samples are ferromagnetic and the magnetization at low field depends on the sample history. Substitution of Cu for Ga strongly shifts Tc to lower temperatures (79 K for x = 0.1) and induces the formation of a spin-glass phase above x = 0.2. The Al- and Ge-doped samples present only a small reduction of Tc reaching 118 K for x = 0.1. Our results are not explained by the unit cell volume behavior, and indicate that the electronic configuration of the non-f element is responsible for the magnetic properties of this system. The observed reduction of the effective moment indicate that the Uranium moment becomes more delocalized for the Cu- and Ge-doped samples when compared to U(Ga,Al)2. © 2002 Elsevier Science B.V. All rights reserved.
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Rights: fechado
Identifier DOI: 10.1016/S0921-4526(01)01212-1
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0036503904&partnerID=40&md5=5dd4c1c6a3a6c2d86e310e1552706796
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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