Magnetic anisotropy and magneto-optical effects of (Pt/Co/Pt/Ni) multilayers

Author

Srinivas, G. ; Shin, Sung-Chul

Author_Institution

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

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3667

Lastpage

3669

Abstract

DC magnetron sputter deposited (Pt/Co/Pt/Ni) multilayers which exhibited Curie temperatures in the range of 150-300°C were studied as possible alternative multilayers for magneto-optical recording to the widely studied Co/Pt, whose Curie temperatures are in the range of 200-400°C. These multilayers exhibited comparable magnetic and magneto-optical properties to Co/Pt multilayers with enhancement of the Kerr rotation at lower wavelengths and negligible Kerr ellipticity over a wide range of the spectrum. The dependence of the magnetic anisotropy on the thicknesses of nickel, cobalt, and platinum sublayers was studied. The surface anisotropies of nickel and cobalt were estimated as -0.003 ergs/cm² and 0.027 ergs/cm² respectively and the total volume anisotropy due to Co and Ni is estimated as -1.74×10⁶ ergs/cm³

Keywords

Curie temperature; Kerr magneto-optical effect; cobalt; ferromagnetic materials; magnetic anisotropy; magnetic multilayers; metallic superlattices; nickel; platinum; sputtered coatings; 150 to 300 degC; Co thickness; Curie temperatures; DC magnetron sputter deposition; Kerr ellipticity; Kerr rotation; Ni thickness; Pt thickness; Pt-Co-Pt-Ni; Pt/Co/Pt/Ni multilayers; magnetic anisotropy; magneto-optical effects; magneto-optical recording; surface anisotropies; total volume anisotropy; Anisotropic magnetoresistance; Cobalt; Magnetic anisotropy; Magnetic multilayers; Magnetic properties; Magnetooptic effects; Magnetooptic recording; Nickel; Perpendicular magnetic anisotropy; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619532

Filename

619532