Influence of a Continuous Activation Energy Spectrum on the Aging Behavior of Magnetic Thin Films

1971 ◽  
Vol 42 (3) ◽  
pp. 1080-1084 ◽  
Author(s):  
Eberhard Pfrenger
Keyword(s):  
Thin Films ◽  
Activation Energy ◽  
Energy Spectrum ◽  
Magnetic Thin Films ◽  
Aging Behavior

Grain Boundary Diffusion in Co/Cu and Co/Cr Magnetic Thin Films

1993 ◽  
Vol 313 ◽  
Author(s):  
John G. Holl-Pellerin ◽  
S.G.H. Anderson ◽  
P.S. Ho ◽  
K.R. Coffey ◽  
J.K. Howard ◽  
...  
Keyword(s):  
Thin Films ◽  
Activation Energy ◽  
Diffusion Coefficient ◽  
Grain Boundary ◽  
Photoelectron Spectroscopy ◽  
Boundary Diffusion ◽  
Magnetic Thin Films ◽  
Grain Boundary Diffusion ◽  
X Ray ◽  
Before And After

ABSTRACTX-ray photoelectron spectroscopy (XPS) has been used to investigate grain boundary diffusion of Cu and Cr through 1000 Å thick Co films in the temperature range of 325°C to 400°C. Grain boundary diffusivities were determined by modeling the accumulation of Cu or Cr on Co surfaces as a function of time at fixed annealing temperature. The grain boundary diffusivity of Cu through Co is characterized by a diffusion coefficient, D0gb, of 2 × 104 cm2/sec and an activation energy, Ea,gb, of 2.4 eV. Similarly, Cr grain boundary diffusion through Co thin films occurs with a diffusion coefficient, Do,gb, of 6 × 10-2cm2/sec and an activation energy, Ea,gb of 1.8 eV. The Co film microstructure has been investigated before and after annealing by x-ray diffraction and transmission electron Microscopy. Extensive grain growth and texturing of the film occurred during annealing for Co deposited on a Cu underlayer. In contrast, the microstructure of Co deposited on a Cr underlayer remained relatively unchanged upon annealing. Magnetometer Measurements have shown that increased in-plane coercivity Hc, reduced remanence squareness S, and reduced coercive squareness S* result from grain boundary diffusion of Cu and Cr into the Co films.

Transmission Electron Microscopy studies of texture of Cr underlayer of magnetic recording hard disk

1991 ◽  
Vol 49 ◽  
pp. 580-581
Author(s):  
L. Tang ◽  
G. Thomas ◽  
M. R. Khan ◽  
S. L. Duan
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Transmission Electron Microscopy ◽  
Magnetic Recording ◽  
Magnetic Thin Films ◽  
Magnetic Films ◽  
Substrate Bias ◽  
Epitaxial Relationship ◽  
Transmission Electron

Cr thin films are often used as underlayers for Co alloy magnetic thin films, such as Co1, CoNi2, and CoNiCr3, for high density longitudinal magnetic recording. It is belived that the role of the Cr underlayer is to control the growth and texture of the Co alloy magnetic thin films, and, then, to increase the in plane coercivity of the films. Although many epitaxial relationship between the Cr underlayer and the magnetic films, such as ﹛1010﹜Co/ {110﹜Cr4, ﹛2110﹜Co/ ﹛001﹜Cr5, ﹛0002﹜Co/﹛110﹜Cr6, have been suggested and appear to be related to the Cr thickness, the texture of the Cr underlayer itself is still not understood very well. In this study, the texture of a 2000 Å thick Cr underlayer on Nip/Al substrate for thin films of (Co75Ni25)1-xTix dc-sputtered with - 200 V substrate bias is investigated by electron microscopy.

Magnetic energy distribution in polycrystalline sputtered CoCr magnetic thin films

2008 ◽  
Vol 42 (2) ◽  
pp. 125-128
Author(s):  
J. F. Al-Sharab ◽  
J. E. Wittig ◽  
G. Bertero ◽  
T. Yamashita ◽  
J. Bentley ◽  
...  
Keyword(s):  
Thin Films ◽  
Energy Distribution ◽  
Magnetic Energy ◽  
Magnetic Thin Films

Structure of magnetic thin films and nanostructures studied by extended X-ray absorption fine structure

2000 ◽  
Vol 454-456 ◽  
pp. 723-728 ◽  
Author(s):  
H. Magnan ◽  
P. Le Fèvre ◽  
A. Midoir ◽  
D. Chandesris ◽  
H. Jaffrès ◽  
...  
Keyword(s):  
Thin Films ◽  
Fine Structure ◽  
Magnetic Thin Films ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Hysteresis in a Microactuator With Single-Domain Magnetic Thin Films

2010 ◽  
Vol 46 (2) ◽  
pp. 630-633 ◽  
Author(s):  
Zung-Hang Wei ◽  
Chi-Kuen Lo ◽  
Da-Ren Liu ◽  
Yi-Ping Hsieh ◽  
Yun-Ruei Lee ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Thin Films ◽  
Single Domain

Magnetic Tuning of Biquadratic Exchange Coupling in Magnetic Thin Films

2003 ◽  
Vol 91 (9) ◽  
Author(s):  
Andreas Moser ◽  
Andreas Berger ◽  
David T. Margulies ◽  
Eric E. Fullerton
Keyword(s):  
Thin Films ◽  
Exchange Coupling ◽  
Magnetic Thin Films ◽  
Biquadratic Exchange ◽  
Magnetic Tuning
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