34 citations · 68 across the 8 of their papers we have counts for
8 papers
Quantum effects in atomically perfect specular spin valve structures
J. M. Teixeira, J. Ventura, Yu. G. Pogorelov +1
A simple tight-binding theoretical model is proposed for spin dependent, current-in-plane transport in highly coherent spin valve structures under specularity conditions. Using qua…
Electrical current-driven pinhole formation and insulator-metal transition in tunnel junctions
J. Ventura, Z. Zhang, Y. Liu +2
Current Induced Resistance Switching (CIS) was recently observed in thin tunnel junctions (TJs) with ferromagnetic (FM) electrodes and attributed to electromigration of metallic at…
Dielectric breakdown in underoxidized magnetic tunnel junctions: Dependence on oxidation time and area
J. Ventura, R. Ferreira, J. B. Sousa +1
Magnetic tunnel junctions (MTJs) with partially oxidized 9 ÅAlO-barriers were recently shown to have the necessary characteristics to be used as magnetoresistive sensors in hig…
Nanoscopic processes of Current Induced Switching in thin tunnel junctions
J. Ventura, J. P. Araujo, J. B. Sousa +3
In magnetic nanostructures one usually uses a magnetic field to commute between two resistance (R) states. A less common but technologically more interesting alternative to achieve…
Short-range effects and magnetization reversal in CoFe thin films: a MOKE magnetometry/domain imaging and AMR study
J. M. Teixeira, R. F. A. Silva, J. Ventura +8
A MOKE magnetometry unit simultaneously sensitive to both in-plane magnetization components, based on an intensity differential detection method, allows us to observe the uniaxial…
Electromigration in thin tunnel junctions with ferromagnetic/nonmagnetic: nanoconstrictions, local heating, and direct and wind forces
J. Ventura, J. B. Sousa, Y. Liu +2
Current Induced Resistance Switching (CIS) was recently observed in thin tunnel junctions with ferromagnetic (FM) electrodes \emph{i.e} FM/I/FM. This effect was attributed to elect…