Thermal Stability of FePt-Based Exchange Coupled Composite Films

Author

Honghua Guo ; Haigang Chu ; Jialin Liao ; Bin Ma ; Zongzhi Zhang ; Qingyuan Jin

Author_Institution

Dept. of Opt. Sci. & Eng., Fudan Univ., Shanghai, China

Volume

49

Issue

7

fYear

2013

fDate

Jul-13

Firstpage

3683

Lastpage

3686

Abstract

Three series of L1₀-FePt based exchange coupled composite (ECC) films L1₀-FePt/Fe, L1₀-FePt/[Co/Ni]_N and L1₀-FePt/[Co/Pt]_N, with different magnetization configurations, on MgO substrates are studied. Though all series of samples show similar dependences of coercivity on the soft layer thickness, their thermal stabilities are much different. The perpendicular ECC film of L1₀-FePt/[Co/Ni]_N shows a higher thermal stability than that of in-plane one of L1₀-FePt/Fe for all the soft layer thicknesses.

Keywords

cobalt; cobalt alloys; coercive force; exchange interactions (electron); iron; iron alloys; magnetic epitaxial layers; nanocomposites; nanofabrication; nanomagnetics; nickel alloys; perpendicular magnetic anisotropy; platinum; platinum alloys; soft magnetic materials; thermal stability; FePt-Co-Pt; FePt-CoNi; FePt-Fe; MgO; coercivity; epitaxial relation; exchange coupled composite films; magnesium oxide substrates; magnetization; nanometer thicknesses; perpendicular magnetocrystalline anisotropy; soft layer thickness; thermal stability; Coercive force; Energy barrier; Iron; Magnetic anisotropy; Magnetic hysteresis; Magnetization; Thermal stability; Exchange coupled composite (ECC); FePt; thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2242436

Filename

6559092