Boron diffusion in magnetic tunnel junctions with MgO (001) barriers and CoFeB electrodes
- School of Physics and CRANN, Trinity College, Dublin 2 (Ireland)
- Advanced Microscopy Laboratory, CRANN, Trinity College, Dublin 2 (Ireland)
Boron diffusion out of the CoFeB layers in model systems with thick CoFeB and MgO layers grown by radiofrequency sputtering or electron-beam evaporation and in MgO-based magnetic tunnel junctions (MTJs) is probed after annealing by x-ray photoemission spectroscopy (XPS) and electron energy loss spectroscopy. Successive interfaces are exposed by ion milling the stacks, layer by layer, in the XPS system. Despite the presence of thick CoFeB and a high annealing temperature of 400 deg. C, we found no boron in the MgO or at the MgO/CoFe interfaces. Similar results are also obtained in the MTJs.
- OSTI ID:
- 21366997
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 96; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ANNEALING
BEAMS
BORON
BORON ALLOYS
CHALCOGENIDES
COBALT ALLOYS
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON SPECTROSCOPY
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY-LOSS SPECTROSCOPY
FERMIONS
HEAT TREATMENTS
IRON ALLOYS
LAYERS
LEPTON BEAMS
LEPTONS
MACHINING
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETORESISTANCE
MILLING
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
SECONDARY EMISSION
SEMIMETALS
SPECTROSCOPY
SPUTTERING
SUPERCONDUCTING JUNCTIONS
SURFACE COATING
TRANSITION ELEMENT ALLOYS
TUNNEL EFFECT
VACUUM COATING
X-RAY PHOTOELECTRON SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ANNEALING
BEAMS
BORON
BORON ALLOYS
CHALCOGENIDES
COBALT ALLOYS
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON SPECTROSCOPY
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY-LOSS SPECTROSCOPY
FERMIONS
HEAT TREATMENTS
IRON ALLOYS
LAYERS
LEPTON BEAMS
LEPTONS
MACHINING
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETORESISTANCE
MILLING
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
SECONDARY EMISSION
SEMIMETALS
SPECTROSCOPY
SPUTTERING
SUPERCONDUCTING JUNCTIONS
SURFACE COATING
TRANSITION ELEMENT ALLOYS
TUNNEL EFFECT
VACUUM COATING
X-RAY PHOTOELECTRON SPECTROSCOPY