Navegação Ciências Exatas e da Terra por Assunto "Cobre"
Resultados 1-12 de 12
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Copper gettering at half the projected ion range induced by low-energy channeling He implantation into silicon
(2000) [Artigo de periódico]He1 ions were implanted at 40 keV into Si <100> channel direction at room temperature (RT) and at 350 °C. The Si samples were subsequently doped with Cu in order to study the gettering of Cu atoms at the defective layer. ... -
Cu gettering in ion implanted and annealed silicon in regions before and beyond the mean projected ion range
(2003) [Artigo de periódico]The strong gettering of Cu atoms in single-crystal Si implanted with 3.5 MeV P+ ions is studied after thermal treatment and Cu contamination. Cu decorates the remaining implantation damage. Three separate Cu gettering ... -
Effect of interface intermixing on giant magnetoresistance in NiFe/Cu and Co/NiFe/Co/Cu multilayers
(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 ... -
Engineering double-shifted hysteresis loops in Co/IrMn/Cu/Co films
(2009) [Artigo de periódico]Co 3 nm /IrMn 15 nm /Cu dCu /Co 7 nm films were subjected to magnetic annealing where its temperature and duration as well as the direction and amplitude of the applied field were varied. We demonstrate that the exchange-bias ... -
Enhanced interface perpendicular magnetic anisotropy in electrodeposited Co/Au(111) layers
(2001) [Artigo de periódico]This work investigates the structure and interface perpendicular magnetic anisotropy (PMA) of electrodeposited Cu/Co/Au(111) sandwiches with variable Co thickness [2–20 monolayers (ML’s)]. In optimum deposition conditions, ... -
Gettering of copper in silicon at half of the projected ion range induced by helium implantation
(2002) [Artigo de periódico]Secondary ion mass spectroscopy, transmission electron microscopy, Rutherford backscattering /channeling spectrometry, and elastic recoil detection analysis measurements were used to determine the Cu gettering behavior ... -
In situ magnetization measurements of Cu/Co multilayers during the process of electrodeposition
(2001) [Artigo de periódico]The electrocrystallization of Cu–Co multilayers has been investigated by means of in situ magnetization measurements, during the electrodeposition, using an electrochemical alternating gradient magnetometer. The hysteresis ... -
Inverse transition in a two-dimensional dipolar frustrated ferromagnet
(2011) [Artigo de periódico]We show that the mean-field phase diagram of the dipolar frustrated ferromagnet in an external field presents an inverse transition in the field-temperature plane. The presence of this type of transition has recently been ... -
Magnetization dynamics in nanostructures with weak/strong anisotropy
(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 ... -
Metalogênese do depósito de cobre Cerro dos Martins, RS: revisão e geoquímica isotópica de SR, O e C-
(2004) [Artigo de periódico]This paper presents the geology, chemical data, Pb-Pb zircon ages, sulfur, carbon, oxygen, strontium isotopes and fluid inclusions of Cerro dos Martins copper deposit. The deposit is hosted by the Neoproterozoic ... -
Microscopic approach to orientational order of domain walls
(2011) [Artigo de periódico]We develop a fully microscopic, statistical mechanics approach to study phase transitions in Ising systems with competing interactions at different scales. Our aim is to consider orientational and positional order parameters ... -
Tunable asymmetric magnetoimpedance effect in ferromagnetic NiFe/Cu/Co films
(2014) [Artigo de periódico]We investigate the magnetization dynamics through the magnetoimpedance effect in ferromagnetic NiFe/Cu/Co films. We observe that the magnetoimpedance response is dependent on the thickness of the non-magnetic Cu spacer ...
