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Magnetoresistance s...
Magnetoresistance studies on CoAl OX Au and CoAl OX NiAu tunnel structures
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- Liu, Ruisheng S. (författare)
- Lund University,Lunds universitet,Högskolan i Halmstad,Tillämpad matematik och fysik (CAMP),Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden
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- Canali, Carlo M. (författare)
- Högskolan i Kalmar,Naturvetenskapliga institutionen,Kalmar University, Kalmar, Sweden
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- Samuelson, Lars (författare)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Pettersson, Håkan (författare)
- Högskolan i Halmstad,Tillämpad matematik och fysik (CAMP)
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(creator_code:org_t)
- New York : American Institute of Physics (AIP), 2008
- 2008
- Engelska.
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Ingår i: Applied Physics Letters. - New York : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 93:20, s. 203107-203107-3
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Abstract
Ämnesord
Stäng
- We report on magnetoresistance (MR) studies on CoAl OX Au and CoAl OX NiAu magnetic tunnel junctions. In spite of the fact that the difference between the two samples is merely a 3 nm thick Ni layer, there is a sharp contrast in MR behavior indicating that the electronic structure at the interface between the ferromagnetic electrodes and the insulating barrier dominates the MR signal. The former sample exhibits a clear tunneling anisotropic MR (TAMR), with the characteristic correlation between resistance and current direction, in contrast to the latter sample which displays a conventional tunneling MR (TMR) dominated by the relative orientation between the magnetization directions of the two electrodes. In addition, the TAMR has a much stronger temperature dependence than the TMR, indicating a much faster drop-off of the tunneling density of states anisotropy than the tunneling electron spin polarization with increasing temperature. Finally, we propose a possible simple way to distinguish TAMR from normal TMR by measuring the resistance of the device at different angles of the external magnetic field. 2008 American Institute of Physics.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Tunnel junctions
- Anisotropy
- Coal
- Coal industry
- Electric resistance
- Electrodes
- Electronic structure
- Magnetic field effects
- Magnetic fields
- Magnetoelectronics
- Magnetoresistance
- Semiconductor junctions
- Spin dynamics
- Tunneling (excavation)
- Tunnels
- Physics
- Fysik
- nickel
- magnetisation
- tunnelling magnetoresistance
- magnetic thin films
- gold
- ferromagnetic materials
- polarisation
- electron spin
- cobalt
- aluminium compounds
- band structure
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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