Poly iron performance composite film reading magnetic head based on magnetoelectric effect

Abstract

The invention relates to a magnetoelectric effect-based multiferroic composite film read magnetic head, which comprises a ferroelectric oxide layer grown on a substrate and a magnetic layer. A plurality of proposals for the structure of the read magnetic head are provided as follows: the ferroelectric oxide layer grown on the substrate serves as the first layer and the magnetic layer as the second layer, which forms the first structural unit; or the magnetic layer grown on the substrate serves as the first layer and the ferroelectric oxide layer as the second layer, which forms the second structural unit; the first structural units are repeatedly stacked on the substrate; the second structural units are repeatedly stacked on the substrate; a ferroelectric oxide layer is then stacked on the first structural units which are repeatedly stacked on the substrate; a magnetic layer is then stacked on the second structural units which are repeatedly stacked on the substrate, and a magnetic layer is grown on the ferroelectric oxide substrate. Compared with a conventional read magnetic head, the multiferroic composite film read magnetic head has the advantages that no external bias magneticfield is needed, the structure is simple, and no energy is consumed.

Description

Multiferroic Composite Thin Film Reading Head Based on Magnetoelectric Effect technical field The invention belongs to the field of preparation and application of multiferroic magnetoelectric composite films, and relates to a multiferroic composite film with a simple structure and the application of a reading head using the magnetoelectric effect based on the novel multiferroic film. Background technique A magnetic sensor in a broad sense is a device that converts changes in the magnetic properties of sensitive components caused by magnetic fields, currents, stress and strain, temperature, light, etc. into electrical signals, and detects corresponding physical quantities in this way. A general magnetic sensor is a device used to detect the existence of a magnetic field, measure the strength of a magnetic field, determine the direction of a magnetic field, or determine whether there is a change in the direction of the strength of a magnetic field. With the rapid development...

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Problems solved by technology

The present invention provides a multiferroic composite film read head based on magnetoelectric effect, aiming at the problems that the existing magnetoresistance effect reading head needs an external bias magnetic field, complex structure and high energy consumption.

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