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A kind of multiferroic compound and preparation method thereof

A multiferroic and compound technology, applied in the field of new multifunctional materials, can solve the problems of easy penetration, large leakage current of materials, and lack of strong magnetoelectric coupling, so as to achieve cheap and easy-to-obtain raw materials, high yield, Simple and fast preparation method

Inactive Publication Date: 2017-03-22
SUN YAT SEN UNIV
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Problems solved by technology

[0004] Although single-phase multiferroic materials have a series of superior properties, there are still some unavoidable problems that restrict their practical applications. The transition temperature of multiferroic materials is below room temperature and does not have strong magnetoelectric coupling. Pure single-phase multiferroic materials are difficult to prepare, etc.

Method used

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  • A kind of multiferroic compound and preparation method thereof
  • A kind of multiferroic compound and preparation method thereof
  • A kind of multiferroic compound and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1 prepares the method for novel single-phase multiferroic compound

[0035] At room temperature, add 2 millimoles of 4-phenylbutylamine, 1 millimole of copper chloride and 0.2 milliliters of 37% (mass) hydrochloric acid into 10 milliliters of water and stir, and slowly evaporate the solvent to obtain yellow flaky crystals with a yield of 96.5 %. The purity is characterized by elemental analysis, calculated C: 47.44%, H: 6.52%, N: 5.62%; test results C: 47.49%, H: 6.38%, N: 5.54%.

Embodiment 2

[0036] Embodiment 2 prepares the method for novel single-phase multiferroic compound

[0037] At room temperature, add 2 mmoles of 4-phenylbutylamine to 10 milliliters of ethanol, add 0.2 milliliters of concentrated hydrochloric acid dropwise under stirring, heat and boil to evaporate most of the solvent, and cool to obtain 4-phenylbutylamine hydrochloride. Add 4-phenylbutylamine hydrochloride and copper chloride at a ratio of 2:1 to ethanol and stir, and evaporate the solvent to obtain a yellow solid with a yield of 97.2%.

Embodiment 3

[0038] Embodiment 3 heat capacity test method

[0039] The heat capacity of the compound crystal was tested with Quantum Design's physical property measurement system (PPMS), and the test temperature range was 2-355K. The heat capacity test results show that the compound undergoes a phase transition at 337K, 143K, and 7.5K. The test results are shown in the attached figure 1 .

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Abstract

The invention relates to a multiferroic compound and a preparation method thereof. The multiferroic compound is characterized by adopting the molecular formula of [C6H5(C2H2)4NH3]2[CuCl4], adopting a layered perovskite-like structure, and belonging to a tetragonal system at 350 K, and monoclinic systems at 293 K and 120 K, wherein the space group of the tetragonal system at 350 K is P4 / mbm, and the cell parameters a, b, c and V of the tetragonal system at 350 K are 7.4531(4) angstrom, 7.4531(4) angstrom, 23.317(2) angstrom, and 1295.2(2) angstrom<3> respectively; the space group of the monoclinic system at 293 K is P2(1) / a, and the cell parameters a, b, c, beta and V of the monoclinic system at 293 K are 7.2620(5) angstrom, 7.4725(6) angstrom,23.282(2) angstrom, 91.999(2) degrees, and 1262.6(2) angstrom<3> respectively; the space group of the monoclinic system at 120 K is P2(1), and the cell parameters a, b, c, beta and V of the monoclinic system at 120 K are 27.663(1) angstrom, 7.4916(5) angstrom, 29.423(2) angstrom, 101.819(2) degrees, and 5968.3(6) angstrom<3> respectively. The multiferroic compound provided by the invention has three basic ferric properties of ferroelasticity, ferroelectricity and ferromagnetism at the same time, and has the advantages that ferroelastic phase transition occurs at a temperature higher than the room temperature; magnetic bistable state occurs during ferroelectric phase transition or ferroelastic phase transition.

Description

technical field [0001] The invention relates to a novel multifunctional material, in particular to a multiferroic material and a preparation method thereof. Background technique [0002] Multiferroic materials refer to multifunctional materials that have two or more basic ferroic properties (such as ferroelasticity, ferroelectricity, and ferromagnetism) at the same time. On the one hand, multiferroic materials have a variety of basic ferroic properties at the same time; on the other hand, there may be coupling effects between the basic ferroic properties, which may realize the mutual regulation of different ferroic properties. Therefore, multiferroic materials are a new class of multifunctional materials with promising applications in spintronics and other fields. The essential mutual exclusion relationship between ferroelectricity and magnetism makes multiferroic materials very rare, and multiferroic materials with three basic ferroic properties and magnetic bistability in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F1/08H01F1/42
Inventor 张伟雄黄波郑赛利薛玮陈小明
Owner SUN YAT SEN UNIV
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