Title :
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
fDate :
9/1/1997 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
