Navegação Ciências Exatas e da Terra por Assunto "Multicamadas magnéticas"

Resultados 1-7 de 7

    • Atomic level mixing induced by Kr irradiation of FeCo/Cu multilayers 

      Graff, Ismael Leandro; Geshev, Julian Penkov; Teixeira, Sergio Ribeiro; Amaral, Livio; Traverse, Agnes (2008) [Artigo de periódico]
      The effects of Kr ion irradiation of FexCo1−x /Cu multilayers are investigated by means of magnetic and x-ray measurements. The irradiation was performed at room temperature with 600 keV of Kr, and the fluences were ranged ...

    • Cone magnetization state and exchange bias in IrMn/Cu/[Co/Pt]3 multilayers 

      Castro, Gustavo Montgomery Bonfim; Geshev, Julian Penkov; Schmidt, Joao Edgar; Baggio-Saitovitch, E.; Nagamine, Luiz Carlos Camargo Miranda (2009) [Artigo de periódico]
      The effects of a Cu interlayer on the perpendicular exchange bias in IrMn/Cu/[Co/ Pt]3 multilayers were investigated by focusing on the correlation between the exchange bias and the magnetic anisotropy. The in-plane ...

    • Ion irradiation effects on the exchange bias in IrMn/Co films 

      Schäfer, Deise; Grande, Pedro Luis; Pereira, Luis Gustavo; Geshev, Julian Penkov (2011) [Artigo de periódico]
      The present work reports on the influence of ion irradiation in exchange-coupled bilayers. Magnetron-sputtered IrMn4 /Co films were irradiated with 40 keV He+ ions and the dependence of their magnetic properties was studied ...

    • 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 ...

    • Remanence plots technique extended to exchange bias systems 

      Oliveira, Artur Harres de; Cichelero, Rafael; Pereira, Luis Gustavo; Schmidt, Joao Edgar; Geshev, Julian Penkov (2013) [Artigo de periódico]
      Efforts have been recently made to use remanence plots in exchange-bias studies. However, since the two remnant magnetizations of a biased loop may differ, this technique cannot be applied in its classical form. This work ...

    • Structural modifications in FexCo1-x/Cu multilayers induced by ion irradiation 

      Graff, Ismael Leandro; Teixeira, Sergio Ribeiro; Amaral, Livio; Alves, Maria do Carmo Martins; Flores, Wladimir Hernandez (2004) [Artigo de periódico]
      The structural evolution of Fe30Co70 /Cu multilayers under ion irradiation is investigated in detail using x-ray techniques. The samples were irradiated with two different ions, 50 keV of He+ and 600 keV of Kr+, at room ...

    • Treatment of the semiclassical Boltzmann equation for magnetic multilayers 

      Pereira, Luis Gustavo; Duvail, Jean-Luc; Lottis, Daniel Kurt (2000) [Artigo de periódico]
      We present an analytical treatment of the Camley–Barnas´ theory of the giant magnetoresistance ~GMR! in magnetic layered structures and obtain an exact and general expression for the resistivity. We used this expression ...