Effect of a Cr interlayer on properties of CoCrTa/Cr media: experiments and simulations

Author

Lee, K.J. ; Kim, S.H. ; Shin, K.H. ; Lee, T.D.

Author_Institution

Dept. of Adv. Mater. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3602

Lastpage

3604

Abstract

An experimental result and a micromagnetics model of a double layered CoCrTa film separated by a thin flash Cr interlayer are described. In the experiment, coercivity and coercivity squareness drastically changed with an increase in the Cr interlayer thickness. There was some coercivity increase in the double layered films compared to a single layered film when the flash Cr interlayer thickness was around 8 Å to 10 Å and coercivity decreased with further increase of the Cr interlayer thickness up to 50 Å. At a very thin interlayer range, the change of coercivity is affected mainly by the change of exchange interaction. By using the assumption of the formation of a Cr island type interlayer at a thin interlayer region, we can explain the increment of coercivity at the initial state

Keywords

chromium; chromium alloys; cobalt alloys; coercive force; exchange interactions (electron); ferromagnetic materials; magnetic anisotropy; magnetic multilayers; magnetic recording noise; tantalum alloys; 8 to 50 angstrom; CoCrTa-Cr; CoCrTa/Cr media; Cr interlayer; Cr interlayer thickness; Cr island type interlayer; coercivity; coercivity squareness; double layered CoCrTa film; exchange interaction; initial state; micromagnetics model; thin flash Cr interlayer; very thin interlayer range; Chromium; Coercive force; Magnetic anisotropy; Magnetic noise; Magnetic recording; Magnetic separation; Micromagnetics; Noise reduction; Perpendicular magnetic anisotropy; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538703

Filename

538703