A micro-nano magnetoelectric coupling device based on ferroelectric thin film and self-assembled magnetic nanoparticle structure

Abstract

Aiming at the problem that high-performance micro-nano magnetoelectric coupling devices are not easy to be controllably prepared, the present invention proposes a patterned +Z and -Z ferroelectric domain processing of ferroelectric thin films through piezoelectric force response microscopy technology, and then through The photochemical deposition method polarizes self-assembled magnetic metal nanoparticles on the surface of ferroelectric domains, and prepares a magnetoelectric coupling device with ferroelectric film and self-assembled magnetic nanoparticle structure. The device includes a ferroelectric thin film layer, a conductive substrate supporting the ferroelectric thin film, and a magnetic nanoparticle structure formed by self-assembly on the ferroelectric thin film layer. The invention utilizes the piezoelectric force response microscopy technology to process PZT ferroelectric domains at the micro-nano level according to the polarization distribution of any pattern, and self-assembles the magnetic metal nanoparticle structure through the photochemical deposition method. The production process is simple, and it is suitable for micro-nano magnetoelectric coupling devices. Integrated preparation.

Description

technical field [0001] The invention relates to a magnetoelectric coupling device, in particular to a magnetoelectric coupling device, which is patterned and polarized on a ferroelectric thin film by piezoelectric force response microscopy, and self-assembled magnetic nanoparticle structure is deposited on the polarized micro-region. electrically coupled devices. Background technique [0002] The magnetoelectric coupling effect is a phenomenon in which materials generate magnetic polarization (electrical polarization) under the action of an electric field (magnetic field). Magnetoelectric materials have a broad application prospect in the field of sensors because they have ferroelectricity, ferromagnetism, and ferroelasticity, and can produce magnetoelectric coupling effects. The magnetoelectric coupling effect has great potential application value in energy harvesting and conversion devices, magnetic detection and sensor devices, tunable microwave devices, information stor...

AI Technical Summary

Problems solved by technology

At present, there are many types of magnetoelectric coupling devices made of magnetoelectric composite materials, but the performance of magnetoelectric coupling devices is greatly affected by the preparation, and the controllability during the preparation process is poor, and the design of integrated preparation is poor.

The layered magnetoelectric composite material produced by the commonly used compression bonding method has many phase interface defects, poor microscopic controllability and complicated process in the preparation process; and operation requirements are very high; the process of preparing and processing devices based on these materials will affect the performance of magnetoelectric materials, and it is difficult to carry out controllable integrated preparation

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