Navegação por Autor "Sommer, Rubem Luis"

Resultados 1-7 de 7

    • 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 ...

    • Dinâmica de paredes de domínios magnéticos : um estudo através da impedanciometria 

      Carara, Marcos Andre (2001) [Tese]
      Neste trabalho é apresentado um estudo sobre a dinâmica de paredes de domínios através de medidas de impedanciometria. É proposto um método que permite a obtenção dos seguintes parâmetros das amostras estudadas: mobilidade ...

    • Magnetization dynamics as derived from magneto impedance measurements 

      Carara, Marcos Andre; Baibich, Mario Norberto; Sommer, Rubem Luis (2000) [Artigo de periódico]
      In this work, the magnetization dynamics of soft magnetic materials is studied with the aid of transverse differential permeability μ(Iac , f ,Hdc) spectra. Contributions to the magnetization processes from domain wall ...

    • Magnetization dynamics in nanostructures with weak/strong anisotropy 

      Andrade, Antonio Marcos Helgueira de; Corrêa, Marcio Assolin; Viegas, Alexandre da Cas; Bohn, Felipe; Sommer, Rubem Luis (2014) [Artigo de periódico]
      We investigate the high-frequency response of magnetization dynamics through magnetoimpedance (MI) effect in Permalloy-based multilayered thin films produced with two different non-magnetic metallic spacers: Cu and Ag. Due ...

    • Magnetization process and magnetoimpedance in (110)[001]FeSi/Sub 3% 

      Carara, Marcos Andre; Gundel, Andre; Baibich, Mario Norberto; Sommer, Rubem Luis (1998) [Artigo de periódico]
      The present article investigates the relation between magnetoimpedance (MI) and the evolution of the magnetic domain structure along the magnetization curves of commercial FeSi3% sheets cut at different angles with respect ...

    • Stress level in finemet materials studied by impedanciometry 

      Carara, Marcos Andre; Baibich, Mario Norberto; Sommer, Rubem Luis (2002) [Artigo de periódico]
      In this work, a study of the stress relief in Finemet ribbons, Fe73.5Cu1Nb3Si16.5B6, as a function of the annealing temperature is presented. The as melt-spun samples are amorphous and become partially crystallized after ...

    • Study of CoFeSiB glass-covered amorphous microwires under applied stress 

      Carara, Marcos Andre; Sossmeier, K.D.; Viegas, Alexandre da Cas; Geshev, Julian Penkov; Chiriac, H.; Sommer, Rubem Luis (2005) [Artigo de periódico]
      Magnetoimpedance-based ferromagnetic resonance (FMR) studies of annealed Co68.15Fe4.35Si12.5B15 glass-covered amorphous microwires under stress are reported. The applied stress modifies the anisotropy and the domain structure ...