DocumentCode :
721424
Title :
Perpendicular magnetic anistropy in Co2FeAl thin films: Effect of the annealing temperature
Author :
Belmeguenai, M. ; Gabor, M. ; Roussigne, Y. ; Petrisor, T. ; Zighem, F. ; Cherif, S. ; Coriolan, T.
Author_Institution :
LSPM, Univ. Paris 13, Villetaneuse, France
fYear :
2015
fDate :
11-15 May 2015
Firstpage :
1
Lastpage :
1
Abstract :
Perpendicular magnetic anisotropy (PMA) is considered as one of the highly desirable properties of magnetic thin films for modern spintronic devices. In fact, the integration of materials with PMA reduces the critical current densities and enhances the thermal stability in spin transfer torque based magnetic random access memories (STT-MRAM). Moreover, the large anisotropy values in such materials yields narrow domain walls making them good candidates for high-density STT-MRAM involving the propagation of magnetic domain walls. Co/Pt and Co/Pd mutilayers have been recognized many years ago as perpendicularly magnetized materials. However, their application as electrodes in magnetic tunnel junctions (TMJ) and in giant magnetoresistance (GMR) devices has been limited by the reduced magnetoresitsance (TMR or GMR) values and the high Gilbert damping parameter due to the spin-orbit coupling (SOC) of the Pt or Pd. Recently, strong PMA in ferromagnetic thin films (FM), Co, CoFe, and CoFeB when interfaced with an oxide, has been demonstrated due to the hybridization of the O 2p and the FM (e.g. Fe) 3d orbitals, together with a degeneracy lift induced by SOC. Therefore, designing heterostructures presenting this interface PMA and incorporating FM that combines high spin polarisation and low Gilbert damping such as Co2FeAl (CFA) full Heusler alloy would be an attractive step towards building suitable materials for the above-mentioned spintronic applications.
Keywords :
aluminium alloys; annealing; cobalt alloys; ferromagnetic materials; ferromagnetic resonance; iron alloys; magnetic thin films; perpendicular magnetic anisotropy; Co2FeAl; Gilbert damping; STT-MRAM; annealing temperature; critical current density; electrodes; ferromagnetic thin films; full Heusler alloy; giant magnetoresistance devices; heterostructures; magnetic domain wall propagation; magnetic tunnel junctions; microstrip ferromagnetic resonance; perpendicular magnetic anisotropy; spin polarisation; spin transfer torque based magnetic random access memories; spin-orbit coupling; spintronic devices; thermal stability; Anisotropic magnetoresistance; Magnetic films; Magnetic hysteresis; Magnetic resonance; Magnetic tunneling; Magnetomechanical effects;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
Type :
conf
DOI :
10.1109/INTMAG.2015.7156506
Filename :
7156506
Link To Document :
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