Interactions in Nanoscale Arrays of Soft Magnetic Bi-Layers

Author

Davies, Joseph E. ; Bennett, Larry H. ; Torre, Edward Della ; Choi, B.C. ; Piramanayagam, S.N. ; Girgis, AndEmad

Author_Institution

Metall. Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD

Volume

44

Issue

11

fYear

2008

Firstpage

2722

Lastpage

2725

Abstract

Magnetic bi-layers are becoming increasingly popular as a medium for perpendicular patterned media. In order to understand the net interactions between the layers and between adjacent magnetic elements in an array, we use a coupled Preisach model to model the hysteresis loops we measured for a sample consisting two magnetically soft layers of FeCoTaZr, separated by an 0.8-nm Ru spacer layer. The model reproduces the major hysteresis loop to decent agreement. The model was then decoupled to reveal the reversal behavior of the individual layers. This paper demonstrates that coupled Preisach modeling of the hysteresis loop is an effective tool to analyze such interacting material systems.

Keywords

cobalt alloys; iron alloys; magnetic hysteresis; magnetic multilayers; ruthenium; soft magnetic materials; tantalum alloys; zirconium alloys; FeCoTaZrJk; Ru; coupled Preisach model; hysteresis loops; interacting material systems; nanoscale arrays; perpendicular patterned media; size 0.8 nm; soft magnetic bilayers; spacer layer; Hysteresis modeling; Preisach model; patterned magnetic arrays; soft magnetic bi-layers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2008.2001521

Filename

4717468