Title :
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
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;
Journal_Title :
Magnetics Letters, IEEE
DOI :
10.1109/LMAG.2014.2370612
