Novel bismuth iron oxide room temperature multiferroic magnetoelectric coupling material, preparation method of coupling material and electronic device

Abstract

The invention relates to a novel bismuth iron oxide room temperature multiferroic magnetoelectric coupling material, which as a structure formula of ABxOy, wherein A is one or several kinds of materials Bi, Pb, Sb, Sn or rare-earth metal elements; B is one or several kinds of materials from transition metal elements of Fe, Sc, Ti, V, Cr, Mn, Co, Ni, Zn and Cu. The novel bismuth iron oxide room temperature multiferroic magnetoelectric coupling material forms a hexagonal crystal structure. The novel bismuth iron oxide room temperature multiferroic magnetoelectric coupling material also has ferrimagnetism and ferroelectricity that the transformation temperature is higher than room temperature. In addition, the invention also provides a preparation method of the novel bismuth iron oxide room temperature multiferroic magnetoelectric coupling material, and an electronic device made of the novel bismuth iron oxide room temperature multiferroic magnetoelectric coupling material.

Description

technical field [0001] The invention relates to the field of material science, in particular to a novel bismuth ferrite room temperature multiferroic magnetoelectric coupling material, a preparation method and an electronic device. Background technique [0002] Multiferroic materials (Multiferroics) are materials that simultaneously have two or more of the three ferromagnetic properties of (anti)ferromagnetism, (anti)ferroelectricity and ferroelasticity. The magnetoelectric coupling material refers to the change of the ferroelectric polarization state or magnetic state of the material under the action of an external magnetic field or electric field, that is, the magnetic state of the material can be controlled by the electric field or the ferroelectric polarization state of the material can be controlled by the external magnetic field. A class of materials. There are very few single-phase multiferroic materials that can realize the magnetoelectric coupling effect, especiall...

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Problems solved by technology

So far, the limitations of single-phase multiferroic materials are: most of the general ferroelectric materials are antiferromagnetic, and antiferromagnets do not exhibit or only exhibit weak magnetism macroscopically, and cannot achieve effective electric field regulation of magnetic polarization characteristics; and In other magnetic materials, ferroelectric properties are generated through special magnetic order, structural order or charge order. Although its magnetoelectric coupling characteristics are relatively strong, the transition temperature is usually much lower than room temperature, which greatly restricts its practical application. Prospects

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