268 citations · 817 across the 15 of their papers we have counts for
7 papers · 1 filter
Magnetic field sensor with voltage-tunable sensing properties
Witold Skowroński, Piotr Wiśniowski, Tomasz Stobiecki +3
We report on a magnetic field sensor based on CoFeB/MgO/CoFeB magnetic tunnel junctions. By taking advantage of the perpendicular magnetic anisotropy of the CoFeB/MgO interface, th…
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…
Collective states of interacting ferromagnetic nanoparticles
O. Petracic, X. Chen, S. Bedanta +4
Discontinuous magnetic multilayers [CoFe/Al2O3] are studied by use of magnetometry, susceptometry and numeric simulations. Soft ferromagnetic Co80Fe20 nanoparticles are embedded in…
Domain imaging, MOKE and magnetoresistance studies of CoFeB films for MRAM applications
J. M. Teixeira, R. F. A. Silva, J. Ventura +7
We present a detailed study on domain imaging, Kerr effect magnetometry (MOKE) and magnetoresistance (MR), for a series of 20 nm CoFeB thin films, both as-…
Anomalous magnetoresistance behavior of CoFe nano-oxide spin valves at low temperatures
J. Ventura, J. B. Sousa, M. A. Salgueiro da Silva +2
We report magnetoresistance curves of CoFe nano-oxide specular spin valves of MnIr/CoFe/nano-oxidized CoFe/CoFe/Cu/CoFe/nano-oxidized CoFe/Ta at different temperatures from 300 to…