Title :
Perpendicular Magnetic Anisotropy in Face-Centered Cubic (111) Co90Fe10/Pt Superlattices
Author :
Jinjun Qiu ; Zhaoliang Meng ; Qi Jia Yap ; Yi Yang ; Geok, Ng Lay Serene ; Guchang Han
Author_Institution :
Data Storage Inst., Agency for Sci., Technol. & Res. (ASTAR), Singapore, Singapore
Abstract :
Ultrathin (Co90Fe10/Pt)8 superlattices composed of alternating CoFe (thickness 0.21 nm) and Pt (thickness 0.23 nm) monolayers were deposited by magnetron sputtering. Superlattices deposited at ultralow sputtering power and high Ar pressure showed perpendicular magnetic anisotropy (PMA) whereas superlattices deposited at higher power and lower pressure and a cosputtered Pt-CoFe alloy film exhibited in-plane magnetic anisotropies. X-ray diffraction and atomic force microscopy showed that the PMA was mainly contributed by the interface anisotropy at Pt/CoFe interfaces. The PMA constant of the superlattice (Co90Fe10/Pt)8 deposited under optimized conditions is as high as 6 × 106 erg/cm3.
Keywords :
X-ray diffraction; atomic force microscopy; cobalt alloys; high-pressure effects; iron alloys; magnetic multilayers; magnetic thin films; metallic thin films; monolayers; perpendicular magnetic anisotropy; platinum; sputter deposition; superlattices; Co90Fe10-Pt; X-ray diffraction; atomic force microscopy; cosputtered alloy film; face-centered cubic (111) superlattices; high Ar pressure; in-plane magnetic anisotropy; interface anisotropy; magnetron sputter deposition; monolayers; perpendicular magnetic anisotropy; ultralow sputtering power; Anisotropic magnetoresistance; Magnetic field measurement; Magnetic superlattices; Nonhomogeneous media; Perpendicular magnetic anisotropy; General topics; magnetization dynamics; perpendicular magnetic anisotropy; superlattice; thermal stability;
Journal_Title :
Magnetics Letters, IEEE
DOI :
10.1109/LMAG.2015.2392078
