Perpendicular Magnetic Anisotropy in CoFeB/Pd Bilayers

COEY, JOHN; FOWLEY, CIARAN; OGUZ, KAAN; RODE, KARSTEN; KURT, HUSEYIN

doi:http://dx.doi.org/10.1109/TMAG.2010.2044374

Perpendicular Magnetic Anisotropy in CoFeB/Pd Bilayers

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Perpendicular Magnetic Anisotropy in CoFeB Pd Bilayers.pdf (365.72 KB)

Date

2010

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Citation

Fowley, Ciaran; Decorde, Nicolas; Oguz, Kaan; Rode, Karsten; Kurt, Huseyin; Coey, J. M. D., Perpendicular Magnetic Anisotropy in CoFeB/Pd Bilayers, IEEE Transactions on Magnetics, 46, 6, 2010, 2116-2118

Abstract

Perpendicular magnetic anisotropy is observed in ultrathin (0.6 nm) amorphous Co40Fe40B20 when sputtered on an MgO (001) buffer layer and capped with Pd. The layers are superparamagnetic with a blocking temperature of similar to 230 K, below which they show an exponential temperature dependence of coercivity. Perpendicular magnetic anisotropy is observed in the as-deposited state and the mechanism is different from that of CoFeB/Pt, which requires postannealing. These ultrathin layers could be a model system for studies of electric field effects on magnetic anisotropy.