Measurement of domain wall energy and simulation of overwrite process on TbFeCo films

Author

Hosoe, Yuzuru ; Suzuki, Yoshio ; Pfeffer, Nicola ; Okamine, Shigenori ; Ohta, Norio ; Suzuki, Ryo

Author_Institution

Hitachi Ltd., Tokyo, Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1718

Lastpage

1720

Abstract

In order to analyze the direct thermomagnetic overwrite process, the domain wall energy, saturation induction, and coercivity for TbFeCo films were measured at high temperatures at which the recorded domains are formed. The domain wall energy was determined from an observation of stripe domains after AC demagnetization at elevated temperatures. Using the obtained parameters, a simulation was performed on an overwrite process with a fixed bias magnetic field for 100- and 200-nm-thick films. The simulation indicates that significant shrinkage of a prerecorded domain occurs for the 200-nm-thick film, which is consistent with previous observations

Keywords

cobalt alloys; coercive force; iron alloys; magnetic domain walls; terbium alloys; thermomagnetic recording; 100 nm; 200 nm; AC demagnetization; TbFeCo films; coercivity; direct thermomagnetic overwrite process; domain wall energy; elevated temperatures; fixed bias magnetic field; high temperatures; prerecorded domain; recorded domains; saturation induction; shrinkage; stripe domains; Coercive force; Demagnetization; Energy measurement; Magnetic domain walls; Magnetic domains; Magnetic field measurement; Magnetic films; Saturation magnetization; Sputtering; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104503

Filename

104503