Download PERPENDICULAR MAGNETIC RECORDING by Sakhrat Khizroev PDF
By Sakhrat Khizroev
Magnetic recording is anticipated to turn into center expertise in a multi-billion greenback within the within the very close to destiny. probably the most severe discoveries concerning perpendicular write and playback heads and perpendicular media have been made in simple terms over the last numerous years due to large and in depth study in either academia and of their fierce race to increase the superparamagnetic restrict within the magnetic recording media. those discoveries seem to be serious for imposing perpendicular magnetic recording into an exact disk drive.
This ebook addresses all of the open questions and concerns which have to be resolved sooner than perpendicular recording can ultimately be applied effectively, and is the 1st monograph in lots of years to deal with this subject.
This ebook is meant for graduate scholars, younger engineers or even senior and more matured researchers during this box who have to collect enough wisdom of the physics of perpendicular magnetic recording so as to additional strengthen the sector of perpendicular recording.
Read Online or Download PERPENDICULAR MAGNETIC RECORDING PDF
Similar electricity and magnetism books
Magnetic Reconnection: MHD Theory and Applications
Magnetic reconnection is on the center of many dynamic phenomena within the universe, equivalent to sunlight flares, geomagnetic substorms and tokamak disruptions. Written through global leaders at the topic, this quantity presents a entire assessment of this basic technique. assurance supplies either a pedagogical account of the elemental thought and a wide-ranging evaluation of the actual phenomena created by way of reconnection--from laboratory machines, the Earth's magnetosphere, and the Sun's surroundings to flare stars and astrophysical accretion disks.
Electromagnetic Compatibility Pocket Guide: Key EMC Facts, Equations, and Data
Each electrical product designed and synthetic around the globe needs to meet electromagnetic compatibility (EMC) rules. while you're a operating engineer or technician, the Electromagnetic Compatibility Pocket advisor: Key EMC proof, Equation and knowledge is your quickest and simplest route to the solutions you must in achieving compliance on your designs.
- Electromagnetic Analysis Using Transmission Line Variables
- Electronic Structure and Magnetism of Inorganic Compounds - Vol. 4 (RSC SPR)
- Electromagnetic Response of Material Media (1994)(en)(304s)
- The electromagnetic field exterior to a system of perfectly reflecting surfaces
- Fusion: An Introduction to the Physics and Technology of Magnetic Confinement Fusion
- Handbook of biological effects of electromagnetic fields. Biological and medical aspects of electromagnetic fields
Additional info for PERPENDICULAR MAGNETIC RECORDING
Example text
Also, as described below, by reducing the throat height, the recording field at saturation is increased. There are two competing factors contributing into the increase of the recording field as a result of the throat height reduction. First, the field is increased because as a result of the throat height reduction the point inside the pole tip at which the saturation starts to occur is shifted closer to the ABS. Calculated magnetization contours along the central cross-track planes inside the main pole tip in two extreme cases, with fairly tall and sufficiently short throats, are shown in Figures 18a and b, respectively.
Therefore, the SUL is an indispensable part of the recording head, as well as it is of the recording medium. 1. Magnetic Image Model It is convenient to use the so-called "magnetic image" model for more transparent description of recording processes in a system with a SUL [53]. According to this model, the SUL is replaced with a half-space, which contains a mirror image of the recording head, as shown in a schematic diagram in Figure 7. Such replacement is theoretically justified provided the SUL can be approximated to be ideal [56].
Hence, the understanding of the principles utilized to design SPH geometry shall make SPH modifications most efficient for satisfying the demand for the areal density increase. Drive coil I Leading pole TH TL G M Main pole W T ABS Figure 16. A schematic diagram of a SPH. Before going into details, it is worth reminding the major requirements towards a write head in perpendicular recording: 1)the ability to generate a sufficiently strong field for recording onto a medium with adequate coercivity, 2)the ability to generate sufficiently large trailing and side field gradients for recording sufficiently sharp transitions and narrow tracks, respectively, 3)the ability to localize the recording field in a fairly limited region along the track so that the skew angle sensitivity is minimized (see Section Skew Angle Sensitivity), 4)the ability to maintain reasonable efficiency of a recording system.