Navegação Ciências Exatas e da Terra por Assunto "Magnetorresistência gigante"

Resultados 1-9 de 9

    • Comparison of computed amplitudes of magnetoresistance in spin-valve structures with wafer probe measurements 

      Dieny, Bernard; Pereira, Luis Gustavo; Taylor, Roger H.; Yamamoto, S.Y. (1998) [Artigo de periódico]
      A code has been developed based on the semi-classical theory of giant magnetoresistance of Camley and Barnas [l]. It computes the sheet conductance and magnetoresistance of spin-valve structures. The input parameters are ...

    • Uma descoberta que mudou a forma de pensar ou como a ciência muda a humanidade 

      Baibich, Mario Norberto (2014) [Artigo de periódico]
      A partir da observação das mudanças introduzidas pela descoberta científica (no caso, a magnetorresistência gigante, de que participamos), tentamos retraçar os desenvolvimentos tecnológicos dos últimos anos. Mesmo sem ...

    • Effect of interface intermixing on giant magnetoresistance in NiFe/Cu and Co/NiFe/Co/Cu multilayers 

      Nagamine, Luiz Carlos Camargo Miranda; Biondo Filho, Armando; Pereira, Luis Gustavo; Silva, Alexandre Mello de Paula; Schmidt, Joao Edgar; Chimendes, Tiago Walescko; Cunha, Joao Batista Marimon da; Baggio-Saitovitch, E. (2003) [Artigo de periódico]
      This article reports on the important influence of the spontaneously built-in paramagnetic interfacial layers on the magnetic and magnetoresistive properties of NiFe/Cu and Co/NiFe/Co/Cu multilayers grown by magnetron ...

    • Generic model of the colossal magnetoresistance pyrochlore Tl/sub 2/Mn/sub 2/O/sub 7/ 

      Ventura, Cecilia Ileana; Gusmao, Miguel Angelo Cavalheiro (2002) [Artigo de periódico]
      The colossal magnetoresistance (CMR) exhibited by the pyrochlore compound Tl₂Mn₂O₇ was discovered in 1996. Important differences with CMR Mn-perovskite compounds regarding crystal structure and electronic properties were ...

    • Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals 

      Raquet, Bertrand; Baibich, Mario Norberto; Broto, Jean Marc; Rakoto, Harison; Lambert, Sébastien; Maignan, Antoine (2002) [Artigo de periódico]
      We studied the electronic conductivity and magnetic properties of quasi-one-dimensional Ca₃Co₂O₆ single crystals. The results evidence a variable range hopping conductivity with temperature-induced crossover between ...

    • Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers 

      Lima, Saulo Cordeiro; Baibich, Mario Norberto (2016) [Artigo de periódico]
      We have studied Co/Cu multilayers to understand the effect of the sample’s width on their magnetoresistance (MR). By keeping constant both the length and the thickness and exploring the widths within the range of usual ...

    • Inhomogeneous structure and magnetic properties of granular Co/sub 10/Cu/sub 90/ alloys 

      Panissod, P.; Malinowska, M.; Jedryka, E.; Wojcik, M.; Nadolski, S.; Knobel, Marcelo; Schmidt, Joao Edgar (2001) [Artigo de periódico]
      Granular Co₁₀Cu₉₀ alloys displaying giant magnetoresistance have been obtained by melt spinning followed by an appropriate heat treatment in the range 0–700 °C. Their structural and magnetic properties have been studied ...

    • Kondo-like behavior and GMR effect in granular Cu90Co10 microwires 

      Zhukova, Valentina A.; Miňo, Jakub; Del Val, Juan José; Varga, Rastislav; Martinez Pino, Gerardo Guido; Baibich, Mario Norberto; Ipatov, Mihail; Zhukov, Arkady (2017) [Artigo de periódico]
      We observed a significant increase of the giant magnetoresistance (GMR) effect (up to 32% after the adequate annealing) and Kondo-like behavior in Cu90Co10 glass-coated microwires. Observed enhancement of the GMR effect ...

    • 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 ...