Navegação Ciências Exatas e da Terra por Autor "Gomes, Affonso Augusto Guidão"

Resultados 1-4 de 4

    • Barkhausen noise in the reentrant system Ni(1-X) Mn(x) : a study of the power spectra 

      Sommer, Rubem Luis; Schmidt, Joao Edgar; Gomes, Affonso Augusto Guidão (1993) [Artigo de periódico]
      In this article, the power spectra of the Barkhausen noise of Ni1-x Mnx is presented. The measurements were made in the ferromagnetic phase at several temperatures and manganese concentrations in order to map the effects ...

    • Co/ag multilayer film : role of annealing on the magnetic properties 

      Schelp, Luiz Fernando; Tosin, Giancarlo; Carara, Marcos Andre; Baibich, Mario Norberto; Gomes, Affonso Augusto Guidão; Schmidt, Joao Edgar (1992) [Artigo de periódico]
      Co( 15 A)/Ag(60 A) multilayers produced by electron beam deposition on a 50 A chromium buffer layer over a Si( 111) wafer have been studied by magnetoresistance, saturation magnetization, coercivity, and anisotropy. Annealing ...

    • Heusler compounds : a brief review and some theoretical studies 

      Rocha, Fabio Saraiva da; Fraga, Gilberto Luiz Ferreira; Brandao, Delmar Estevam; Silva, Celso Arami Marques da; Gomes, Affonso Augusto Guidão (2000) [Artigo de periódico]
      In this review paper we briefly recali some existing experimental and theoretical work on the magnetic properties, specific heat and transport properties of pure and pseudo ternary Heusler compounds. Previous existing ...

    • Laves-phase pseudobinaries a(fe1-xbx)2 (a=zr,hf;b=al,si): some structural and magnetic properties 

      Silva, Celso Arami Marques da; Schmidt, Joao Edgar; Livi, Flavio Pohlmann; Gomes, Affonso Augusto Guidão (1991) [Artigo de periódico]
      The lattice parameters and the saturation magnetization are measured for the series of intermetallic compounds A(Fe,B)2 A = Zr, Hf and B = Si and Al, with concentrations less than 15%. The magnetization measurements and ...