Microstructural analysis of cobalt alloy single and multilayer longitudinal recording media

1993 ◽  
Vol 51 ◽  
pp. 1020-1021
Author(s):  
M. Kuwabara ◽  
M.R. Visokay
Keyword(s):  
Magnetic Properties ◽  
Deposition Temperature ◽  
Microstructural Analysis ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Media Noise ◽  
Longitudinal Recording ◽  
Sputtering Pressure ◽  
Multilayer Media

Co-based alloys have been successfully used as sputtered thin film media for hard disk drives. Media with higher recording density and lower media noise are required for the future hard disk drives. The magnetic properties can be controlled by processing and alloy composition. However, the origin of the magnetic properties, such as film coercivity and transition noise, are not fully understood yet. In this paper the analysis of the magnetic properties versus microstructure of Co-based alloy single and multilayer media is reported.Co-alloy media were prepared by DC magnetron sputtering of Cr, Co-alloy (CoCrNi and CoCrPt) and overcoat materials(C and Zr) on Ultra Densified Amorphous Carbon (UDAC) substrates. The sputtering pressure and deposition temperature were 3-5 mTorr and between 30°C and 300°C, respectively.The coercivity of CoCrNi and CoCrPt media increases with the deposition temperature in the range between room temperature and a few hundred degree Celsius. Figure 1 shows cross-section TEM(XTEM) images of CoCrPt media.

State-of-the-Art Magnetic Hard Disk Drives

MRS Bulletin ◽  
2006 ◽  
Vol 31 (5) ◽  
pp. 379-383 ◽  
Author(s):  
I.R. McFadyen ◽  
E.E. Fullerton ◽  
M.J. Carey
Keyword(s):  
High Performance ◽  
Unit Area ◽  
State Of The Art ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Recording Media ◽  
Disk Drives ◽  
Current State ◽  
Longitudinal Recording ◽  
Magnetic Hard Disk

AbstractMagnetic recording has progressed dramatically over the last 50 years, with an increase of almost eight orders of magnitude in the amount of information stored per unit area of disk space.Two key enablers of this progress have been the recording medium and the read-back head.This article reviews the current state of the art in multilayer thin-film longitudinal recording media and giant magnetoresistive (GMR) read heads, with particular emphasis on the nanostructured magnetic materials that are key to today's high-performance hard disk drives.

scholarly journals Examining the feasibility of the urban mining of hard disk drives

2020 ◽  
Vol 248 ◽  
pp. 119216
Author(s):  
Laura Talens Peiró ◽  
Alejandra Castro Girón ◽  
Xavier Gabarrell i Durany
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Urban Mining

scholarly journals Evaluation of Vibration Characteristics of Suspensions for Hard Disk Drives and Reducing the Vibration by Using Viscoelastic Dampers.

2002 ◽  
Vol 68 (667) ◽  
pp. 720-727 ◽  
Author(s):  
Hiromitsu MASUDA ◽  
Toshihiko SHIMIZU ◽  
Mikio TOKUYAMA ◽  
Haruhide TAKAHASHI ◽  
Kousaku WAKATSUKI ◽  
...  
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Vibration Characteristics ◽  
Disk Drives ◽  
Viscoelastic Dampers

Feasibility study of thermal positioning control actuator for hard disk drives

2012 ◽  
Vol 18 (9-10) ◽  
pp. 1383-1388 ◽  
Author(s):  
Masaru Furukawa ◽  
Junguo Xu ◽  
Jin Liu ◽  
Jianhua Li ◽  
Shoya Nosaki ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Positioning Control

Analysis of Electrical Resonance of a Hard Disk Drives Suspension Interconnect and Invasion Into Read Signal Path

2014 ◽  
Vol 50 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Nobumasa Nishiyama ◽  
Yuji Soga ◽  
Kazuniro Nagaoka ◽  
Tomohisa Okada ◽  
John T. Contreras ◽  
...  
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Electrical Resonance ◽  
Signal Path ◽  
Read Signal

NONLINEAR MID-FREQUENCY DISTURBANCE COMPENSATION IN HARD DISK DRIVES

2005 ◽  
Vol 38 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Ying Li ◽  
Guoxiao Guo ◽  
Youyi Wang
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Disturbance Compensation

Nonlinearity of Thermal Spacing Control in Hard Disk Drives

2009 ◽  
Vol 45 (2) ◽  
pp. 816-821 ◽  
Author(s):  
K. Aoki ◽  
T. Watanabe
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives
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