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Dynamic storage method onto vertically recording medium magnetic disc by using laser assistant longitudinal magnetic head

A vertical recording and dynamic storage technology, applied in the fields of optics, information storage, and magnetics, can solve problems such as the difficulty of writing perpendicular magnetic recording, achieve the effects of improving magnetic storage density, reducing test costs, and being easy to implement

Inactive Publication Date: 2009-03-25
FUDAN UNIV
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  • Application Information

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Problems solved by technology

But with the further increase of recording density (>500Gbit / in 2 ), perpendicular magnetic recording will also encounter the bottleneck of difficult writing

Method used

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  • Dynamic storage method onto vertically recording medium magnetic disc by using laser assistant longitudinal magnetic head
  • Dynamic storage method onto vertically recording medium magnetic disc by using laser assistant longitudinal magnetic head
  • Dynamic storage method onto vertically recording medium magnetic disc by using laser assistant longitudinal magnetic head

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Embodiment Construction

[0021] The principle of the dynamic storage method of the laser-assisted longitudinal magnetic head on the perpendicular recording medium disk of the present invention is as follows figure 1 As shown, it uses a traditional Guzik Spinstand disk dynamic tester, combined with a self-designed and built optical platform, uses the vertical magnetic field component at one end of the longitudinal head as a new magnetic recording field, and focuses on a 405nm wavelength laser with a diameter of about 2±0.2μm. Under the induced action of the light spot, the vertical medium disk that rotates at a high speed (2000~10000 rpm) is locally heated to effectively reduce the coercive force of the magnetic recording medium during the signal writing process, thereby realizing the pairing of the vertical magnetic field component at one end of the longitudinal magnetic head. Writing of magnetic information.

[0022] Using the method of the present invention to establish a dynamic test system is mainly c...

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Abstract

The invention discloses a method for realizing the dynamic memory of the perpendicular recording medium disk through the laser-assisted longitudinal disk head, and belongs to the technical field of magnetics, optics and information storage. The method is characterized in that based on the laser induced magnetic recording principle, the vertical magnetic field component at one end of the vertical disk head is taken as a new magnetic recording field, and the vertical recording medium disk which rotates at a high speed is locally heated by the induction of the laser focusing spot with the diameter being 2 plus or minus 0.2 Mum and the wave length being 405 nm, so that the coercivity of the magnetic recording medium can be effectively reduced during the process of signal write-in, thereby realizing the write-in of the magnetic information by the vertical magnetic field component at one end of the vertical disk head. The invention provides an effective method for realizing the recording of the vertical recording medium disk through the laser-assisted vertical disk head under the condition that the magnetic recording dynamic testing system is not required to be updated, which can effectively reduce the system cost and improve the utilization rate of the prior device at the same time.

Description

Technical field [0001] The invention relates to a dynamic storage method for a laser-assisted longitudinal magnetic head to realize a perpendicular recording medium disk, and belongs to the technical fields of magnetism, optics and information storage. Background technique [0002] Magnetic recording systems, including hard disks and tape drives, are one of the core technologies for information storage. Magnetic recording technology has been invented for more than one hundred years. Since the 1950s, magnetic recording technology has developed rapidly. Especially after entering the 1990s, due to the application of magnetoresistive heads, the recording density, capacity and access speed of hard disk drives have been greatly improved, and they are the most important information storage method in today's computer systems. [0003] A very important performance index of the hard disk recording system is the amount of information that can be accommodated per unit area on the disk. In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/02G11B11/105
Inventor 廖嘉霖魏慎金李晶金庆原
Owner FUDAN UNIV
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