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.

Assessment of Current Health of Hard Disk Drives

2010 ◽  
Author(s):  
Abe Zeid ◽  
Sagar Kamarthi
Keyword(s):  
Health Management ◽  
State Of The Art ◽  
Hard Disk Drives ◽  
Health Assessment ◽  
Hard Disk ◽  
Assessment Method ◽  
Hard Disks ◽  
Disk Drives ◽  
Future Directions ◽  
Self Monitoring

Prognostics and health management of computer hard disk drives is beneficial from two different angles: it can help computer users plan for timely replacement of HDDs before they catastrophically fail and cause serious data loss; it can also help product recover facilities reuse hard disks recovered from the end-of-life computers for building refurbished computers. This paper presents a HDD health assessment method using Self-Monitoring, Analysis, and Reporting Technology (SMART) attributes. It also presents the state-of-the art results in monitoring the condition of hard disks and offers future directions for distributed hard disk monitoring.

Recording media research for future hard disk drives

2009 ◽  
Vol 321 (6) ◽  
pp. 485-494 ◽  
Author(s):  
S.N. Piramanayagam ◽  
K. Srinivasan
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Recording Media ◽  
Disk Drives ◽  
Media Research

NANOSCIENCE AND NANOTECHNOLOGY FOR MEMORY AND DATA STORAGE

COSMOS ◽  
2011 ◽  
Vol 07 (01) ◽  
pp. 25-30
Author(s):  
T. TAHMASEBI ◽  
S. N. PIRAMANAYAGAM
Keyword(s):  
Data Storage ◽  
Hard Disk Drives ◽  
Random Access ◽  
Hard Disk ◽  
Recording Media ◽  
Disk Drives ◽  
Magnetic Recording Media ◽  
Access Memory ◽  
Magnetic Random Access Memory ◽  
The Core

Data storage is one area of technology where nanotechnology has been used even before the term nanotechnology became very popular. The magnetic recording media — the disk that stores information in hard disk drives — used nanotechnology in the late 1990s, in the form of grains which are 15 nm or less in diameter (the grains in current technology are about 8 nm in diameter). The reading sensors of hard disk also make use of thin nanostructures in several dimensions to read information from the recording media. This paper introduces the technology behind the magnetic random access memory and related topics, which form the core of the symposium L of ICMAT 2011, which is titled "Memory, Nanomagnetics, Materials and Devices".

Tribology challenges of modern magnetic hard disk drives

Wear ◽  
2001 ◽  
Vol 251 (1-12) ◽  
pp. 1124-1132 ◽  
Author(s):  
Andrei Khurshudov ◽  
Robert J. Waltman
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Magnetic Hard Disk

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.

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