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Type: Artigo de periódico
Title: Electron spin resonance g shift in Gd5Si4, Gd5Ge4, and Gd5.09Ge2.03Si1.88
Author: Pires, MJM
Mansanares, AM
da Silva, EC
Magnus, A
Carvalho, G
Gama, S
Coelho, AA
Abstract: Gd5Si4, Gd5Ge4, and Gd5.09Ge2.03Si1.88 compounds were studied by electron spin resonance. The arc-melted samples were initially characterized by optical metallography, x-ray diffraction, and static magnetization measurements. The electron spin resonance results show a negative paramagnetic g shift for Gd5Si4 and Gd5.09Ge2.03Si1.88, and a smaller positive one for Gd5Ge4. The values of the exchange parameter (j) between the localized Gd-4f spins and the conduction electrons are obtained from the g shifts. These values are positive and of the same order of magnitude for Gd5Si4 and Gd5.09Ge2.03Si1.88, and negative one order of magnitude smaller for Gd5Ge4. The electron spin resonance data were interpreted considering the strongly bottlenecked solution of the coupled Bloch-Hasegawa equations.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review B. American Physical Soc, v. 73, n. 14, 2006.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.73.144404
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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