Single-phase multi-ferroic material and preparation method thereof

A multiferroic material, a single-phase technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve problems that are not suitable for practical applications and do not have spontaneous polarization

Inactive Publication Date: 2018-07-31
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chen Xiangming's research group from Zhejiang University discovered the rare earth double perovskite superlattice La 2 NiMnO 6 It has ferroelectric and ferromagnetic transition temperatures higher than room temperature, but there is no spontaneous polarization, which is not suitable for practical applications

Method used

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  • Single-phase multi-ferroic material and preparation method thereof
  • Single-phase multi-ferroic material and preparation method thereof
  • Single-phase multi-ferroic material and preparation method thereof

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0022] Step 1: weigh raw material lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O), praseodymium nitrate (Pr(NO 3 ) 2 ), nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), and 50% manganese nitrate solution (50% Mn(NO 3 ) 2 ·6H 2 0), and dissolved in deionized water, heated and stirred in a water bath in a magnetic stirrer for 1h to obtain a uniform mixed solution, at this time the solution became green, and the temperature of the water bath was 70°C;

[0023] Step 2: Add citric acid to the mixed solution prepared in step 1, and continue stirring with a magnetic stirrer in a water bath at 70° C. for 1 h. The molar ratio of citric acid to metal cations is 2:1.

[0024] Step 3: Add ammonia water dropwise to the mixed solution prepared in step 2 until the pH value of the solution is 8;

[0025] Step 4: Continue to stir and heat t...

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Abstract

The invention relates to a single-phase multi-ferroic material and a preparation method thereof, and belongs to the field of multi-ferroic materials. The multi-ferroic material has the structure of Pr2NiMnO6 / La2NiMnO6(PLNMO), and has room-temperature multi-ferroic properties; the ferroelectric ferromagnetic transition temperature is higher than room temperature; meanwhile, the multi-ferroic material has spontaneous polarization intensity; macroscopic magnetic sequence shows ferromagnetic properties. The multi-ferroic material is prepared from the raw material of a Pr2O3-La2O3-NiO-MnO2-series nitrate compound through a solid phase method, a coprecipitation method or a sol-gel method. The PLNMO single-phase multi-ferroic material provided by the invention has spontaneous polarization, realizes ferromagnetic transition at the room temperature or above, and can reach nano-scale.

Description

technical field [0001] The invention relates to a single-phase multiferroic material and a preparation method thereof, belonging to the field of multiferroic materials. Background technique [0002] Multiferroic materials are a class of materials that exhibit both magnetic and electrical ordering behaviors at critical temperatures, and have great potential application value in aerospace, communications, electronic devices and other fields. So far, the types of single-phase multiferroic materials are still very scarce. Among known multiferroic materials, BiFeO 3 is the most concerned, it has a very high ferroelectric ferromagnetic transition temperature (T N =880K,T C =643K), but its macroscopic magnetic moment is G-type antiferromagnetism, which is not suitable for practical application. Therefore, finding magnetoelectric materials with ferroelectric ferromagnetic transition temperature above room temperature and macroscopic magnetic order showing ferromagnetism is the t...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y30/00
Inventor 陆海鹏杨雯谢建良邓龙江
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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