Relation Between Some Process Parameters And Properties Of Transition Metal-Rare Earth Films For Magneto-Optic Recording

1985 ◽  
Author(s):  
F. E. Luborsky ◽  
J. T. Furey ◽  
R. E. Skoda ◽  
B. C. Wagner
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Process Parameters ◽  
Magneto Optic

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.

Characterizing the Magneto-optic Properties of Amorphous Rare Earth - Transition Metal Thin Films

1998 ◽  
Vol 517 ◽  
Author(s):  
W. A. Challener
Keyword(s):  
Thin Film ◽  
Rare Earth ◽  
Transition Metal ◽  
Figure Of Merit ◽  
Low Noise ◽  
Optical Recording ◽  
High Coercivity ◽  
Metal Thin Films ◽  
Mo Effect ◽  
Magneto Optic

AbstractThe amorphous rare earth - transition metal (RE-TM) thin film alloys and nanolayered materials exhibit numerous properties advantageous for optical recording, including perpendicular anisotropy, high coercivity and low magnetization at room temperature, low noise, and easily adjustable Curie and compensation points. As a result these materials have been employed in all commercial magneto-optic (MO) media. On the other hand, the MO effect of these materials is relatively small and tends to decrease with decreasing wavelength. It is important to understand the useful limits of these materials in MO media, and to determine if their MO figure of merit can be substantially increased through appropriate doping or nanolayering. In this paper we discuss experimental techniques for measuring MO properties, a theoretical approach for analyzing the data and designing optical thin film stacks, and results for a variety of RE-TM thin film materials.

Stability of amorphous transition metal-rare earth films for magneto-optic recording

1985 ◽  
Vol 21 (5) ◽  
pp. 1618-1623 ◽  
Author(s):  
F. Luborsky ◽  
J. Furey ◽  
R. Skoda ◽  
B. Wagner
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Magneto Optic

Thermomagnetic switching on rare‐earth transition‐metal alloy magneto‐optic disks

1989 ◽  
Vol 66 (3) ◽  
pp. 1273-1278 ◽  
Author(s):  
J. H. Crasemann ◽  
P. Hansen ◽  
M. Rosenkranz ◽  
K. Witter
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Metal Alloy ◽  
Transition Metal Alloy ◽  
Magneto Optic

Atomic structure and thermal stability in amorphous rare‐earth–transition‐metal magneto‐optic alloys (abstract)

1988 ◽  
Vol 64 (10) ◽  
pp. 5507-5507 ◽  
Author(s):  
C. J. Robinson ◽  
M. G. Samant ◽  
E. E. Marinero ◽  
G. S. Cargill III
Keyword(s):  
Thermal Stability ◽  
Rare Earth ◽  
Transition Metal ◽  
Atomic Structure ◽  
Magneto Optic

Thermal conductivity of amorphous rare earth—transition metal thin films for magneto-optic recording

1992 ◽  
Vol 216 (1) ◽  
pp. 181-183 ◽  
Author(s):  
L.J. Shaw-Klein ◽  
T.K. Hatwar ◽  
S.J. Burns ◽  
S.D. Jacobs ◽  
J.C. Lambropoulos
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Rare Earth ◽  
Transition Metal ◽  
Metal Thin Films ◽  
Magneto Optic
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