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A zinc oxide base nano semiconductor electronic self-rotation material and its synthesizing method

A nano-semiconductor and electron spin technology, applied in the direction of the magnetism of inorganic materials, can solve the problems of poor reproducibility of ferromagnetism at room temperature, unclear magnetic origin, easy to mix, etc., and achieve superior magnetic properties and superior high-temperature ferromagnetism , low cost effect

Inactive Publication Date: 2007-10-17
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

However, the following problems currently exist in the research of ZnO-based diluted magnetic semiconductors: (1) the reproducibility of ferromagnetism at room temperature is not good; (2) the origin of the magnetism is not clear; (3) the prepared diluted magnetic semiconductors are easy to mix There is a second magnetic phase
(4) Most of the methods for preparing ZnO-based dilute magnetic semiconductors are physical or chemical pyrolysis deposition methods that require organic metal salts as raw materials. These methods require expensive equipment and raw materials
These problems severely limit the application of ZnO-based dilute magnetic semiconductors in spintronic materials

Method used

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  • A zinc oxide base nano semiconductor electronic self-rotation material and its synthesizing method
  • A zinc oxide base nano semiconductor electronic self-rotation material and its synthesizing method
  • A zinc oxide base nano semiconductor electronic self-rotation material and its synthesizing method

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example 1

[0012] Example 1: 2.0206g (50mmol) of analytically pure sodium hydroxide was dissolved in 50mL of absolute ethanol under magnetic stirring. Disperse 0.2855 g (1.1 mmol) of analytically pure cobalt acetate with 4 crystal waters and 2.2141 g (10 mmol) of analytically pure zinc acetate with 2 crystal waters in 100 mL of absolute ethanol under magnetic stirring. After the zinc acetate is completely dissolved, add the sodium hydroxide solution to the ethanol dispersion of cobalt acetate and zinc acetate under magnetic stirring, transfer the resulting mixture into a reaction kettle, seal it, and transfer it to an oven at 120°C for heat preservation 2 hours. After the reaction, the reactor was taken out and cooled to room temperature naturally. Finally, the product (light green) was separated by filtration, washed repeatedly with water, and then dried naturally in the air to obtain light green Zn 1-x co x O nanorods.

example 2

[0013] Example 2: 2.0174g (50mmol) of analytically pure sodium hydroxide was dissolved in 50mL of absolute ethanol under magnetic stirring. With 0.2196g (0.88mmol) analytically pure cobalt acetate with 4 crystal waters and 2.2018g (10mmol) analytically pure zinc acetate with 2 crystal waters and 0.0189g (0.11mmol) analytically pure silver nitrate in magnetic stirring Disperse in 100 mL of absolute ethanol. After the zinc acetate and silver nitrate dissolve completely, add the sodium hydroxide solution to the ethanol dispersion of cobalt acetate, silver nitrate and zinc acetate under magnetic stirring, transfer the obtained mixture into the reaction kettle, seal it, and transfer it to the In an oven at 120°C, keep warm for 2 hours. After the reaction, the reactor was taken out and cooled to room temperature naturally. Finally, the product was separated by filtration, washed repeatedly with water, and then dried naturally in the air to obtain Zn 1-x co x O: Ag nanorods dilut...

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Abstract

A zinc oxide group nanometer semiconductor electronic spin material and a synthesizing method thereof, relate to a nanometer semiconductor electronic spin material field. The material has a chemical formula of Zn1-xCoxO:Ag (x is 0-0.1), and is synthesized by a solvent heating method. Addition of an elementary Ag in the invention effectively converts Zn1-xCoxO from paramagnetism to ferromagnetism, a high temperature coercive force is obvious larger than the coercive force of a low temperature 2K, the invention expresses an excellent high temperature ferromagnetism.

Description

technical field [0001] The invention relates to a room temperature ferromagnetic dilute magnetic semiconductor material and a synthesis method thereof. Background technique [0002] Spintronics is electronics that utilizes electron or hole spin conduction. It was originally a project supported by the Defense Advanced Research Project Agency (DARPA) in 1994. Its purpose is to create a new generation of electronic components, which not only use the charge of electrons, but also the spin characteristics of electrons. Therefore, components that use spin will have stronger functions than traditional ones that only use conductive charges. Moreover, in order to continuously improve the performance of devices, the scale of materials needs to be continuously reduced, but when it reaches the nanometer level, its development will reach the limit due to quantum effects. However, at the quantum scale, the spin properties of electrons can be fully displayed. If the properties of electro...

Claims

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Application Information

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IPC IPC(8): H01F1/40
Inventor 李莉萍邱晓清李广社
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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