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Data storage device and method

A device and data technology, applied in the field of mass storage memory devices, can solve problems such as data density limitations, and achieve the effects of easy scaling, high storage density, and simplified scalability

Inactive Publication Date: 2010-03-24
INGENIAHLDG UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data density per unit length of the nanowire (in terms of the number of pits) is thus limited by the encoding scheme

Method used

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Examples

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Embodiment Construction

[0085] Figure 3A is a schematic plan view representation of a magnetic nanowire structure embodying the invention. For axes, the following conventions are used throughout. The z axis is the vertical axis, and the x and y axes are horizontal. The basic structure is a cross formed by a first nanowire 100 extending along the x direction and a second nanowire 110 extending along the y direction, and the first nanowire 100 and the second nanowire 110 cross each other at a junction 115 .

[0086]Magnetic domains 114 aggregated in nanowires 100 and 110 are shown in a conventional manner with arrows indicating magnetic moments. Each domain is bounded by domain walls 112 . As understood in the art, nanowire domain walls are divided into two categories, such as head-to-head domain walls and tail-to-tail domain walls shown as domain walls 112, the significance of which will be self-evident. Head-to-head domain walls carry positive magnetostatic charges and tail-to-tail domain walls ...

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Abstract

A serial magnetic mass storage device and associated data storage method is provided based on magnetic nanowires that support single magnetic domains separated by domain walls. Each data-storing nanowire has a plurality of crossing nanowires along its length, forming cross junctions that constitute domain wall pinning sites. Data is fed through each data-storing nanowire by moving the magnetic domains under the action of a field that alternates between alignment and anti-alignment with the crossing nanowires. The data is encoded in the chirality of the domain walls, with up and down chiralitytransverse domain walls being used to encode 0's and 1's. Data is clocked into each nanowire with suitable nucleation generators capable of nucleating domains with domain walls of pre-defined chirality. Data is clocked out of each nanowire with suitable magnetic field sensors that sense the chirality.

Description

technical field [0001] This invention relates to data storage, and more particularly, but not exclusively, to mass storage memory devices capable of storing gigabytes of data and capable of storing data at high densities. Background technique [0002] Hard drives with magnetic disks are the primary technology for mass data storage and retrieval in personal computers (PCs). With current technology, hard disk drives have a storage capacity of up to about 100-200 Gbytes, but in devices such as portable music players, video players, and other portable multimedia devices, which typically have drive capacities in the range of 30-40 Gbytes Smaller units of smaller capacity are used in some devices, even smaller devices such as digital cameras below 1OGbytes. The basic structure of a hard disk drive dates back to the phonograph of the 19th century and is basically a mechanical device based on a rotating platter with features that can be positioned on the platter to read (and write)...

Claims

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Application Information

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IPC IPC(8): G11C19/08
CPCG11C19/08G11C11/14G11C19/0816
Inventor 拉塞尔·波尔·考伯纳D·派迪特D·雷德
Owner INGENIAHLDG UK LTD
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