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Vortex state magnetic storage unit of nano unit structure

A technology of magnetic storage unit and unit structure, applied in the field of magnetic materials and magnetic storage, to achieve the effect of fast response speed

Inactive Publication Date: 2015-04-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cell size has a lower limit for the formation of the vortex state

Method used

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  • Vortex state magnetic storage unit of nano unit structure
  • Vortex state magnetic storage unit of nano unit structure
  • Vortex state magnetic storage unit of nano unit structure

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing:

[0016] The present invention adopts currently internationally recognized micromagnetic simulation software (published by NIST of the United States National Institute of Standards) to simulate the magnetic moment distribution of the magnetic unit. In the unit structure of the simulated design (such as figure 1 As shown), a stable vortex magnetic moment distribution is obtained.

[0017] What the unit structure of the present invention used material adopted is the NiFe soft magnetic material commonly used in the storage unit, and its saturation magnetization is M s =8.6×10 5 A / m, the exchange integral is A=1.3×10 -11 J / m. The overall thickness of the groove unit structure is 20nm, the groove depth is 4nm, the outer diameter is 80nm, and the inner diameter is 60nm.

[0018] As shown in Figure 2, it can be seen from the simulation results that when the diameter is greater ...

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Abstract

The invention discloses a vortex state magnetic storage unit of a nano unit structure. The vortex state magnetic storage unit is a grooved disc-shaped structure which is formed by thickening the edge of an ordinary disc-shaped magnetic vortex structure unit, the minimum value of the outer diameter D of a groove is 80nm, the depth of the groove is 4nm to 68nm, the inner diameter d of the groove is greater than 8nm, and the overall thickness of the unit is 16nm to 136nm. The vortex state magnetic storage unit has advantages that by modifying the structure of the traditional disc storage unit, the stable vortex state can be maintained under a smaller size; moreover, the rapid polarization switching can be completed under the in-situ control, and the high-density magnetic storage can be realized.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials and magnetic storage, and in particular relates to a small-sized vortex magnetic storage unit. Background technique [0002] Due to the development of computer and Internet technology, human beings have entered the rapidly developing digital information age, which requires processing and saving a large amount of data and information, which makes people's requirements for information storage move towards high density, large capacity, high speed, low cost and development in the direction of miniaturization. In recent years, with the continuous deepening of nanoscience research and the further improvement of nanotechnology, micro / nano-scale patterned films have aroused people's interest in exploration. The most critical difference in patterned recording is that each magnetic carrier for recording data is separated from each other by photolithography, which makes the boundary of each bit n...

Claims

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Application Information

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IPC IPC(8): G11C11/15
CPCG11C11/161G11C11/1675
Inventor 邓龙江毕美王昕张丽陆海鹏谢建良
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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