scholarly journals Magnetism of rare-earth–transition-metal nanoscale multilayers. II. Theoretical analysis of magnetization and perpendicular magnetic anisotropy

1990 ◽  
Vol 42 (16) ◽  
pp. 10446-10459 ◽  
Author(s):  
Z. S. Shan ◽  
D. J. Sellmyer ◽  
S. S. Jaswal ◽  
Y. J. Wang ◽  
J. X. Shen
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Theoretical Analysis ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy

Magneto-Optical Storage Materials

MRS Bulletin ◽  
1990 ◽  
Vol 15 (4) ◽  
pp. 31-39 ◽  
Author(s):  
Frans J.A.M. Greidanus ◽  
W. Bas Zeper
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Optical Storage ◽  
Optical Recording ◽  
Good Oxidation Resistance ◽  
Recording Material ◽  
High Storage ◽  
Very High

Magneto-optical (MO) recording combines the advantages of optical recording and magnetic recording. It offers very high storage densities, it is a noncontact technique, and it allows an unlimited number of read/write cycles. Although the potential of magneto-optical recording was recognized nearly 25 years ago, suitable materials did not exist at that time. Since then, substantial efforts have been made optimizing existing materials and searching for new ones. In 1973 an important development was started by Chaudhari et al., who discovered amorphous GdCo with perpendicular magnetic anisotropy as a possible MO recording material. Today amorphous ternary rare-earth (RE) transition-metal (TM) alloys like GdTbFe and TbFeCo are the recording layers in the MO disks which appear on the market. Although these materials show good recording performance, they also exhibit some drawbacks, mainly caused by their susceptibility to oxidarion and corrosion. However, two new classes of suitable MO materials with good oxidation resistance are emerging.

Perpendicular magnetic anisotropy and magneto‐optical properties of evaporated (Fe,Co)–rare‐earth amorphous binary alloy films

1988 ◽  
Vol 64 (10) ◽  
pp. 5492-5494 ◽  
Author(s):  
A. Yoshihara ◽  
M. Takahashi ◽  
T. Shimamori ◽  
T. Wakiyama ◽  
M. Miyazaki ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Magnetic Anisotropy ◽  
Binary Alloy ◽  
Perpendicular Magnetic Anisotropy ◽  
Alloy Films ◽  
Amorphous Binary Alloy

Ellipsometric, Magneto-Optic, and Magnetic Properties of Sputtered Rare Earth-Transition Metal Multilayers

1987 ◽  
Vol 103 ◽  
Author(s):  
Thomas E. Tiwald ◽  
John A. Woollam ◽  
Z. S. Shan ◽  
D. J. Sellmyer
Keyword(s):  
Magnetic Properties ◽  
Optical Properties ◽  
Rare Earth ◽  
Transition Metal ◽  
Magnetic Anisotropy ◽  
Layer Thickness ◽  
Spectral Range ◽  
Dielectric Response ◽  
Dielectric Response Function ◽  
Optical Dielectric

ABSTRACTEllipsometric and magneto-optical properties of amorphous Dy (3.5 Å) and amorphous Fe (25 Å to 12.5 Å) multilayers were investigated over the spectral range from 3000 Å to 8000 Å in magnetic fields to 0.21 Tesla. In this range of layer thickness the magnetic anisotropy is vertical. Kerr rotations, θk, were weakly spectrally dependent, and as large as 0.1 degrees. The diagonal and off-diagonal elements of the optical dielectric response function were determined over the full spectral range, and were found to be dependent on iron layer thickness.

Amorphous Transition Metal-Rare Earth Alloy Films for Magneto-Optic Recording

1986 ◽  
Vol 80 ◽  
Author(s):  
Fred E. Luborsky
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Perpendicular Magnetic Anisotropy ◽  
Anisotropy Constant ◽  
Environmental Stability ◽  
Large Temperature ◽  
Kerr Rotation ◽  
Rare Earth Alloy ◽  
History Of ◽  
Magneto Optic

AbstractThis paper reviews the history of the development of films for use in magneto-optic recording. A discussion of why these early attempts with films of MnBi and Europium compounds were abandoned is given. The current work on amorphous transition metal-rare earth alloys is then reviewed. The origins of the necessary perpendicular magnetic anisotropy are discussed. The ideal combination of properties desired are: a high room temperature coercivity, a large temperature coefficient of coercivity, a large perpendicular anisotropy constant, large Ms, thermal and environmental stability, and, depending on whether a reflection or absorption mode of operation will be used, a large Kerr rotation with large reflectivity or a large Faraday rotation with a small specific absorption. These factors, their control, bow they influence the recording performance and the limits on performance of these amorphous films are discussed.

Sign in / Sign up

Export Citation Format

Share Document