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Type: Artigo de periódico
Title: Electron spin resonance and magnetic characterization of the Gd5.09Ge2.03Si1.88
Author: Pires, MJM
Carvalho, AMG
Gama, S
da Silva, EC
Coelho, AA
Mansanares, AM
Abstract: Electron spin resonance was applied on samples of Gd5.09Ge2.03Si1.88. The results are discussed under the scope of magnetization measurements, optical metallography, and wavelength dispersive spectroscopy. Polycrystalline arc-melted samples submitted to different heat treatments were investigated. The correlation of the electron spin resonance and magnetization results permitted a characterization of the present phases and their transitions. Two coexisting phases in the temperature range between two phase transitions have been identified and associated to distinct crystallographic phases. Additionally, the magnetic moment at high temperatures has been estimated from the measured effective g factor. A peak value of 21.5 J/kg K for the magnetocaloric effect was obtained for a sample heat treated at 1500 degrees C for 16 h.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review B. American Physical Soc, v. 72, n. 22, 2005.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.72.224435
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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