Navegação Ciências Exatas e da Terra por Assunto "Momentos magnéticos"

Resultados 1-8 de 8

    • 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 ...

    • Effect of composition and short-range order on the magnetic moments of Fe in Fe/sub 1-x/V/sub x/ alloys 

      Krause, Joao Carlos; Schaf, Jacob; Costa Junior, Moacir Indio da; Paduani, Clederson (2000) [Artigo de periódico]
      We report dc magnetization, Mössbauer spectroscopy, and x-ray-diffraction measurements on Fe₁₋xVx alloys, quenched or heat treated, with single phase bcc structure in the whole concetration range. It is well known that the ...

    • Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe 

      Ouardi, Siham; Fecher, Gerhard H.; Balke, Benjamin; Beleanu, Andreea; Kozina, Xeniya; Stryganyuk, Gregory; Felser, Claudia; Klöß, Werner; Schrader, Hartmut; Bernardi, Fabiano; Morais, Jonder; Ikenaga, Eiji; Yamashita, Yoshiyuki; Ueda, Shigenori; Kobayashi, Keisuke (2011) [Artigo de periódico]
      This work reports on the electronic and crystalline structure and the mechanical, magnetic, and transport properties of the polycrystalline Heusler compound Co2MnGe. The crystalline structure was examined in detail by ...

    • Magnetic behavior of the NixFe1−xNb2O6 quasi-one-dimensional system : isolation of Ising chains by frustration 

      Sarvezuk, Paulo Willian Carvalho; Gusmao, Miguel Angelo Cavalheiro; Cunha, Joao Batista Marimon da; Isnard, Olivier (2012) [Artigo de periódico]
      Physical properties of the NixFe1−xNb2O6 compounds are investigated combining x-ray and neutron powder diffraction with magnetic and calorimetry measurements as well as 57Fe Mössbauer spectroscopy. This system is known to ...

    • Magnetism in dilute magnetic oxide thin films based on SnO/sub 2/ 

      Fitzgerald, C.B.; Venkatesan, M.; Dorneles, Lucio Strazzabosco; Gunning, R.; Stamenov, Plamen; Coey, John Michael Douglas; Stampe, P.A.; Kennedy, R.J.; Moreira, Eduardo Ceretta; Sias, Uilson Schwantz (2006) [Artigo de periódico]
      Thin films of SnO2 prepared by pulsed-laser deposition on R-cut sapphire substrates exhibit ferromagnetic properties at room temperature when they are doped with Cr, Mn, Fe, Co, or Ni, but not with other 3d cations. ...

    • Magnetism, magnetoresistance, and Shubnikov-de Haas oscillations in Na-implanted highly oriented pyrolitic graphite 

      Pires, Rafael Fernando; Pureur Neto, Paulo; Behar, Moni; Pimentel Junior, Jorge Luiz; Schaf, Jacob; Kopelevich, Y. (2012) [Artigo de periódico]
      We report on magnetization, magnetoresistance, and Shubnikov-de Haas oscillations experiments in Na-implanted samples of highly oriented pyrolitic graphite (HOPG). Different ion fluences were applied so that samples with ...

    • Mesoscopic magnetic states in metallic alloys with strong electronic correlations : a percolative scenario for CeNi/sub 1-x/Cu/sub x/ 

      Marcano, N.; Gómez Sal, J.C.; Espeso, José Ignacio; De Teresa, J.M.; Algarabel, P.A.; Paulsen, C.; Iglesias, Jose Roberto (2007) [Artigo de periódico]
      We present evidence for the existence of magnetic clusters of approximately 20 Å in the strongly correlated alloy system CeNi1-xCux (0.7 ≤ x ≤ 0.2) based on small angle neutron scattering experiments as well as the occurrence ...

    • Pressure and chemical substitution effects in the local atomic structure of BaFe2As2 

      Granado, E.; Ferreira, Leticie Mendonca; Garcia, Flávio; Azevedo, Gustavo de Medeiros; Fabbris, Gilberto Fernandes Lopes; Bittar, Eduardo Matzenbacher; Adriano, C.; Garitezi, T. M.; Rosa, P. F. S.; Bufaiçal, L. F.; Avila, M. A.; Terashita, H.; Pagliuso, P. G. (2011) [Artigo de periódico]
      The effects of K and Co substitutions and quasihydrostatic applied pressure (P < 9 GPa) in the local atomic structure of BaFe2As2, Ba(Fe0.937Co0.063)2As2 and Ba0.85K0.15Fe2As2 superconductors were investigated by extended ...