Activation volume and correlation to media noise in high-density longitudinal recording media

1999 ◽  
Vol 35 (5) ◽  
pp. 2652-2654 ◽  
Author(s):  
B.R. Acharya ◽  
T. Suzuki ◽  
R. Takano
Keyword(s):  
Activation Volume ◽  
High Density ◽  
Recording Media ◽  
Media Noise ◽  
Longitudinal Recording

Effect of microstructural features on media noise in longitudinal recording media

1993 ◽  
Vol 73 (10) ◽  
pp. 5566-5568 ◽  
Author(s):  
T. P. Nolan ◽  
R. Sinclair ◽  
R. Ranjan ◽  
T. Yamashita
Keyword(s):  
Recording Media ◽  
Media Noise ◽  
Longitudinal Recording

High-density longitudinal recording media with CrMoB underlayer

2003 ◽  
Vol 39 (5) ◽  
pp. 2261-2263
Author(s):  
Mingjun Yu ◽  
B.R. Acharya ◽  
G. Choe
Keyword(s):  
High Density ◽  
Recording Media ◽  
Longitudinal Recording

Effect of Grain Size and Magnetic Switching Volume on Media Noise Due to Intergranular Coupling in CoCrTaPt/Cr Thin Film Media

1998 ◽  
Vol 517 ◽  
Author(s):  
Sudhir S. Malhotra ◽  
Brij B. Lal ◽  
Michael A. Russak
Keyword(s):  
Thin Film ◽  
Thermal Stability ◽  
Grain Size ◽  
Substrate Temperature ◽  
High Density ◽  
Recording Media ◽  
Media Noise ◽  
Magnetic Switching ◽  
High Density Recording

AbstractIn this work the effect of grain size and magnetic switching volume on media noise due to intergranular coupling for CoCrTaPt/Cr thin film media deposited at substrate temperature of 160 and 260°C are investigated. The film deposited at substrate temperature of 260°C showed weaker intergranular interaction and lower media noise compared to the film deposited at 160°C. The magnetic switching volume (V*) is an important consideration for thermal stability and media noise in high density recording media. The magnetic switching volume V* for the film deposited at 160 and 260°C was calculated to be 3.7 x 10-18 and 3.2 x 10-18 cm3 respectively. The magnetic switching volume is correlated to the average Co-alloy grain size, media noise and the interactions between the grains.

Grain separation enhanced magnetic coercivity in Pt/Co multilayers.

1993 ◽  
Vol 51 ◽  
pp. 1038-1039 ◽  
Author(s):  
G.A. Bertero ◽  
R. Sinclair
Keyword(s):  
Remanent Magnetization ◽  
Strong Influence ◽  
Uniaxial Anisotropy ◽  
Magnetic Coupling ◽  
Recording Media ◽  
Magnetic Media ◽  
Signal To Noise ◽  
Out Of Plane ◽  
Longitudinal Recording ◽  
The Relationship

Pt/Co multilayers displaying perpendicular (out-of-plane) magnetic anisotropy and 100% perpendicular remanent magnetization are strong candidates as magnetic media for the next generation of magneto-optic recording devices. The magnetic coercivity, Hc, and uniaxial anisotropy energy, Ku, are two important materials parameters, among others, in the quest to achieving higher recording densities with acceptable signal to noise ratios (SNR). The relationship between Ku and Hc in these films is not a simple one since features such as grain boundaries, for example, can have a strong influence on Hc but affect Ku only in a secondary manner. In this regard grain boundary separation provides a way to minimize the grain-to-grain magnetic coupling which is known to result in larger coercivities and improved SNR as has been discussed extensively in the literature for conventional longitudinal recording media.We present here results from the deposition of two Pt/Co/Tb multilayers (A and B) which show significant differences in their coercive fields.

Advances in magnetic films of epsilon-iron oxide toward next-generation high-density recording media

2021 ◽  
Author(s):  
Hiroko Tokoro ◽  
Asuka Namai ◽  
Shin-ichi Ohkoshi
Keyword(s):  
Iron Oxide ◽  
Magnetic Films ◽  
High Density ◽  
Recording Media ◽  
Next Generation ◽  
Magnetic Recording Media ◽  
Film Performance ◽  
High Density Recording ◽  
Recent Developments ◽  
High Density Magnetic Recording

Recent developments in magnetic films composed of epsilon-iron oxide are introduced. The film performance is studied and improved toward the next-generation of high-density magnetic recording media.

Overwrite Modulation in Co-Based Thin Film Longitudinal Recording Media

1994 ◽  
Vol 18 (S_1_PMRC_94_1) ◽  
pp. S1_467-470
Author(s):  
Michinobu SUEKANE ◽  
Masao MIYAMURA
Keyword(s):  
Thin Film ◽  
Recording Media ◽  
Longitudinal Recording
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