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

fYear

2014

fDate

22-23 Sept. 2014

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Symposium 2014 - Celebrating 50th Anniversary of IEEE Magnetics Society (MSSC50)

Conference_Location

Singapore

Type

conf

DOI

10.1109/MSSC.2014.6947935

Filename

6947935