Browsing by Author "VAN DIJKEN, SEBASTIAN"
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Correlation between perpendicular exchange bias and magnetic anisotropy in IrMn/[Co/Pt](n) and [Pt/Co](n)/IrMn multilayers
VAN DIJKEN, SEBASTIAN; COEY, JOHN MICHAEL DAVID (American Institute of Physics, 2005)Perpendicular exchange bias has been observed for IrMn/[Co/Pt]n and [Pt/Co]n/IrMn multilayers in the as-deposited state. The exchange bias field is largest when the IrMn film is grown on magnetically saturated Co/Pt ... -
Influence of annealing on the bias voltage dependence of tunnelling magnetoresistance in MgO double-barrier magnetic tunnel junctions with CoFeB electrodes
FENG, GEN; VAN DIJKEN, SEBASTIAN; COEY, JOHN MICHAEL DAVID (American Institute of Physics, 2006)Double-barrier magnetic tunnel junctions with two MgO barriers and three CoFeB layers exhibiting tunneling magnetoresistance (TMR) values of more than 100% were fabricated. The bias voltage dependence of the TMR ratio is ... -
IrMn as exchange-biasing material in systems with perpendicular magnetic anisotropy
VAN DIJKEN, SEBASTIAN; COEY, JOHN MICHAEL DAVID (American Institute of Physics, 2005)Contact between a Co/Pt multilayer and an IrMn film leads to perpendicular exchange bias. The exchange bias field does not depend on the degree of (111) film texture and for Co/Pt multilayers with IrMn at the bottom it can ... -
Magnetite Schottky barriers on GaAs substrates
VAN DIJKEN, SEBASTIAN; COEY, JOHN MICHAEL DAVID (American Institute of Physics, 2005)Thin films of HfO2 produced by pulsed-laser deposition on sapphire, yttria-stabilized zirconia, or silicon substrates show ferromagnetic magnetization curves with little hysteresis and extrapolated Curie temperatures far ... -
Reply to ?Comment on `Size-dependent scaling of perpendicular exchange bias in magnetic nanostructures???
VAN DIJKEN, SEBASTIAN; COEY, JOHN MICHAEL DAVID (American Physical Society, 2008)Our observation of size-dependent scaling effects at room temperature in exchange-biased multilayers grown onto arrays of polystyrene nanospheres Phys. Rev. B 75, 012413 2007 does not conflict with the observation by ... -
Size-dependent scaling of perpendicular exchange bias in magnetic nanostructures
VAN DIJKEN, SEBASTIAN; COEY, JOHN MICHAEL DAVID (American Physical Society, 2007)Size-dependent scaling is studied in exchange biased nanostructures obtained by depositing Pt/Co 3 /IrMn multilayers with perpendicular magnetization onto an array of monodisperse polystyrene nanospheres with a diameter ...