Method of generating and erasing magnetic Skyrmion by using electric field

A magnetic skyrmion and electric field technology, which is used in the manufacture/processing of electromagnetic devices, material selection, static memory, etc., can solve the problems of device stability, high energy, consumption, etc. consumption effect

Active Publication Date: 2019-08-16
NANJING UNIV
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Problems solved by technology

[0004] Usually, the method of generating magnetic skyrmions uses spin-polarized current, but higher current density means higher energy consumption, and heat generation also has a certain impact on the stability of the device.

Method used

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  • Method of generating and erasing magnetic Skyrmion by using electric field
  • Method of generating and erasing magnetic Skyrmion by using electric field
  • Method of generating and erasing magnetic Skyrmion by using electric field

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Embodiment Construction

[0012] Using magnetron sputtering or molecular beam epitaxy on ferroelectric material substrates ( image 3 The magnetic thin film is grown on the middle and lower layer materials (the upper layer is the material that produces the magnetic skyrmion state), the magnetic material has perpendicular anisotropy, and at the same time has chiral magnetic interaction, the thickness of the ferroelectric material is adjusted, the growth environment of the film and The annealing temperature, time and other parameters make the energy of the single domain state and the skyrmion state in the magnetic material close. The magnetic skyrmion material is grown on the ferroelectric material substrate, and an electric field ( image 3 After the middle power supply is connected to the electrode), the ferroelectric material will be strained, which will affect the magnetic anisotropy of the magnetic material, so that the magnetic skyrmion state and the single domain state in the area under the electr...

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Abstract

A method of generating and erasing magnetic Skyrmion by using an electric field is provided. A magnetic Skyrmion material is grown on a ferroelectric material substrate. After an electric field is applied locally, the ferroelectric material produces a strain, the anisotropic property of the magnetic material is affected, the single domain state in the region under an electrode changes from a metastable state to an unstable state, and thus, magnetic Skyrmion is generated. The generation of magnetic Skyrmion by using an electric field is characterized by low power consumption and low device heat.

Description

technical field [0001] The invention relates to a magnetic skyrmion track memory, which is a method for generating and erasing magnetic skyrmions by using an electric field. Background technique [0002] Track memory technology uses nanowires 10,000 times thinner than human hair to store data, just like a racing car running on a similar track with a magnetic field. This method of reading and writing multi-bit data to magnetic nanowires is an important step toward prototyping racetrack memory. Previous work has demonstrated the feasibility of the basic concept of racetrack memory, but manipulation of multi-bit data has not been achieved. The memory promises to combine the data storage of magnetic hard drives with the durability and speed of flash memory at a relatively low cost. Plus, racetrack memory doesn't degrade over time like flash memory. Although still in the early stages of research, these advantages of racetrack memory will make it an attractive replacement for h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L43/06H01L43/10H01L43/14G11C11/16
CPCG11C11/161H10N52/00H10N52/01H10N50/85
Inventor 丁海峰缪冰锋孙亮
Owner NANJING UNIV
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