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|Type:||Artigo de evento|
|Title:||Magnetic Properties Of U(ga1-xmx)2 With M = Cu, Al And Ge|
|Author:||Da Silva L.M.|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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