Role of Thermal Effects on Magnetic Interactions in Stacked Magnetic Layers With Perpendicular Anisotropy

Author

Piramanayagam, S.N. ; Hang Khume Tan ; Varghese, Binni

Author_Institution

Data Storage Inst., A*STAR (Agency for Sci., Technol. & Res.), Singapore, Singapore

Volume

5

fYear

2014

fDate

2014

Firstpage

1

Lastpage

4

Abstract

The role of thermally excited magnetization reversals on magnetic interactions in stacked magnetic layers with perpendicular anisotropy has been investigated by first-order reversal curves (FORC) and coercive squareness (S*). For this purpose, a study of the effect of systematic variation of exchange interaction in granular perpendicular magnetic anisotropy layers on FORC contours has been carried out along with S* and coercivity measurements at various timescales. The results indicate that the FORC contour peak height is a better parameter than S* to study the exchange interactions in systems such as magnetic recording media and is insensitive to thermal effects.

Keywords

coercive force; exchange interactions (electron); magnetic hysteresis; magnetic multilayers; magnetisation reversal; perpendicular magnetic anisotropy; coercive squareness; exchange interaction; first-order reversal curves; granular perpendicular magnetic anisotropy layers; magnetic interactions; magnetic recording media; stacked magnetic layers; thermally excited magnetization reversal; time scales; Couplings; Market research; Media; Perpendicular magnetic recording; Systematics; Thermal stability; Information Storage; Information storage; first-order reversal curves; first-order reversal curves (FORC); magnetic interactions; magnetic recording media;

fLanguage

English

Journal_Title

Magnetics Letters, IEEE

Publisher

ieee

ISSN

1949-307X

Type

jour

DOI

10.1109/LMAG.2014.2370612

Filename

6955775