Experimental studies of the switching properties of synthetic antiferromagnetic (SAF) media

Author

Wachenschwanz, David E. ; Malhotra, Sudhir ; Stafford, Donald ; Shan, Zhengsheng ; Bertero, Gerardo A.

Author_Institution

Komag Inc., San Jose, CA, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

1937

Lastpage

1939

Abstract

The magnetic switching characteristics of synthetic antiferromagnetic (SAF) longitudinal recording are much more complicated than for conventional longitudinal thin film recording media due to a time lag in the switching of the various magnetic layers due to anti-ferromagnetic coupling. The SAF media´s switching characteristics are studied in terms of their effect on the recording performance of such media. It is shown that recording parametrics such as amplitude, nonlinear transition shift (NLTS) and PW₅₀ can be significantly influenced by this time-lag effect. Optimization of the SAF structure to reduce these effects on the recording performance is also discussed.

Keywords

antiferromagnetic materials; magnetic hysteresis; magnetic multilayers; magnetic recording; magnetic switching; thermal stability; Ru; Ru coupling layer; amplitude; antiferromagnetic coupling; magnetic hysteresis loops; magnetic layer switching time lag; magnetic switching characteristics; nonlinear transition shift; recording performance; synthetic antiferromagnetic longitudinal recording media; thermal stability; Antiferromagnetic materials; Couplings; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Magnetic materials; Magnetic recording; Magnetic switching; Thermal stability; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802852

Filename

1042050