Title :
Perpendicular magnetic anisotropy in magnetron sputtered FCC(111) (Co90Fe10/Pt)n superlattices
Author :
Jinjun Qiu ; Zhaoliang Meng ; Qi Jia Yap ; Guchang Han
Author_Institution :
Data Storage Inst., Agency for Sci., Technol. & Res., Singapore, Singapore
Abstract :
Ultrathin (Co90Fe100.21/Pt0.23)n superlattices composing of alternative CoFe and Pt monolayers were deposited by magnetron sputtering. The superlattices deposited at ultra-low sputtering power and high Ar pressure (low energy) shown perpendicular magnetic anisotropy (PMA) whereas both co-sputtered Pt-CoFe alloy film and superlattices deposited at high energy exhibited in-plane magnetic anisotropies (IMA). X-ray diffraction (xrd) and atomic force microscopy (AFM) analyses indicate the PMA was mainly contributed by the interface anisotropy at Pt/CoFe interface. The PMA constant (Ku) of (Co90Fe10/Pt)8 deposited under optimized conditions reaches to 6×106 erg/cc.
Keywords :
X-ray diffraction; atomic force microscopy; cobalt alloys; iron alloys; magnetic multilayers; metallic superlattices; perpendicular magnetic anisotropy; platinum; sputter deposition; AFM; Ar pressure; Co90Fe10-Pt; PMA constant; X-ray diffraction; XRD; alloy film; atomic force microscopy; in-plane magnetic anisotropies; interface anisotropy; magnetron sputtered FCC(111) superlattices; monolayers; perpendicular magnetic anisotropy; ultralow sputtering power; ultrathin superlattices; Magnetic multilayers; Magnetic superlattices; Magnetic tunneling; Nonhomogeneous media; Perpendicular magnetic anisotropy; magnetron sputter; perpendicular magnetic anisotropy; superlattice;
Conference_Titel :
Magnetics Symposium 2014 - Celebrating 50th Anniversary of IEEE Magnetics Society (MSSC50)
Conference_Location :
Singapore
DOI :
10.1109/MSSC.2014.6947935
