Cr-doped Bi2Fe4O9 multiferroic ceramic material and preparation method thereof

Abstract

The invention discloses a Cr-doped Bi2Fe4O9 multiferroic ceramic material and a preparation method thereof. The preparation method comprises the step of carrying out high temperature annealing treatment by adopting a citric acid-nitrate sol gel self-propagating combustion reaction method to obtain the multiferroic ceramic material with a molecular formula of Bi2Fe4(4-x)Cr4xO9 (x is more than 0 and less than or equal to 0.08). The Cr-doped Bi2Fe4O9 multiferroic ceramic material has a single-phase structure, low leakage current and multiferroic property at room temperature and magnetic property and ferroelectricity of the material can be regulated by changing the doping content of Cr; and a preparation technology is simple, cost is low, no reducing atmosphere is required, and environmental protection, no toxicity and no pollution are achieved.

Description

technical field

[0001] The invention belongs to the technical field of multiferroic ceramic materials, in particular to a transition metal doped Bi 2 Fe 4 o 9 Multiferroic ceramic material and its preparation method. Background technique

[0002] With the development of the information industry, in line with the pursuit of better performance such as high speed, large capacity, and low loss, people have put forward higher and higher requirements for the integration and miniaturization of devices. As a new type of functional material, multiferroic materials integrate ferroelectric and ferromagnetic properties, and there is a magnetoelectric coupling effect between the two. This mutual control of magnetism and electricity is used in information storage, magnetic sensors, and spintronics High-tech fields such as devices, integrated circuits, and capacitor-inductor integrated devices have broad application prospects.

[0003] bismuth oxide matrix ceramic material Bi 2 Al 4 ...

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