Magnetic heterostructure based on electric field regulation and control and preparation method ofmagnetic heterostructure

Abstract

The invention discloses a magnetic heterostructure based on electric field regulation and control and a preparation method of the magnetic heterostructure, and belongs to the field of preparation of magnetoelectric coupling materials and devices. The magnetic heterostructure comprises a substrate, a bottom electrode layer formed on the substrate, a heterojunction formed on the bottom electrode layer, and a top electrode layer formed on the heterojunction; and the heterojunction is a magnetic thin film / MXene heterojunction, and the magnetic thin film and the MXene thin film are stacked up and down. According to the heterostructure, voltage is applied in the vertical direction through the bottom electrode layer and the top electrode layer, so that directional movement of hydrogen ions in the magnetic film / MXene heterojunction is realized, and the hydrogen ions are converted into hydrogen atoms to be stored in the MXene film. The magnetic anisotropy of the magnetic film is very sensitive to the concentration of the hydrogen atoms adsorbed on the surface, so that the magnetic film can be regulated and controlled by external voltage, the hydrogen atoms are quickly diffused into the atmosphere after the bias voltage is removed, and the magnetism of the film is recovered to the original state.

Description

technical field [0001] The invention belongs to the field of magnetoelectric coupling materials and device preparation, and in particular relates to a magnetic heterogeneous structure based on electric field regulation and a preparation method thereof. Background technique [0002] Electric field control material magnetism can be seen in many material systems. For example, in ferromagnetic materials, the magnetic adjustment is performed by changing the number and density of charge carriers, while in multiferroic materials, the electric polarization and magnetization of the applied electric field occur. coupling. In addition, another voltage-controlled magnetic anisotropy effect, which generally occurs in ferromagnetic metal / metal oxide structures, can be interpreted as the electrochemical reaction of the film, that is, the directional ion migration of the film under the action of an applied electric field, in the A reversible transition in magnetism is accomplished during t...

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Problems solved by technology

[0003] However, the reliability and non-volatility of electronically controlled ion migration still need to be strengthened. Although the hydrogen ion migration has achieved more than 2000 cycles at a relatively fast speed, the storage time of the device can only last for a few days when the power is off. It is beneficial for permanent data storage, and although the heavy metal lead used as a hydrogen storage material has high hydrogen mobility, it is prone to hydrogen jetting under vacuum or high temperature conditions. It is foreseeable to look for better quality hydrogen in the migration of hydrogen ions Storage materials will be the next big challenge

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