Multiferroic Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3-NiFe2O4 composite film and preparation method thereof

A composite film, multiferroic technology, applied in the field of materials, can solve the problems of weak ferromagnetic nature of hysteresis loops that cannot be saturated, large leakage conductance, limited practical applications, etc., to achieve increased structural distortion, magnetic coercive field Small, the effect of reducing leakage current density
CN104445996AActive Publication Date: 2015-03-25SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2015-03-25

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Abstract

The invention discloses a multiferroic Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3-NiFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 crystalline state film and a NiFe2O4 crystalline state film which are compounded together. The preparation method comprises the following steps: respectively preparing a Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 precursor solution and a NiFe2O4 precursor solution; and spinning on a substrate to prepare a multilayer NiFe2O4 film, and spinning on the NiFe2O4 film to prepare a multilayer Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 film, thereby obtaining the target product. The equipment requirement is simple, the prepared film is high in uniformity, the doping amount is easy to control, and the ferroelectric properties and ferromagnetic properties of the film are greatly improved. Meanwhile, the leakage current density of the film is effectively reduced.
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Description

technical field

[0001] The invention belongs to the field of materials and relates to multiferroic Bi 0.96-x Sr 0.04 RE x Fe 0.94 mn 0.04 Cr 0.02 o 3 -NiFe 2 o 4 Composite membrane and method for its preparation. Background technique

[0002] In recent years, BiFeO 3 As a new type of ferromagnetoelectric material, it has ferroelectricity and antiferromagnetism, accompanied by weak ferromagnetism, which has attracted great interest. BiFeO 3 Simple perovskite structure with trigonal twist, ferroelectric order (TC = 810°C) and G-type antiferromagnetic order (TN = 380°C) at room temperature, is one of the few single-phase multiferroic materials . BiFeO 3 Magnetoelectric coupling is widely used in information storage, spintronic devices, information storage, image display, pyroelectric effect, uncooled infrared focal plane array, etc. However, pure phase BiFeO 3 There is a problem of large leakage conductance, which makes it impossible to obtain a saturated hystere...

Claims

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