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Cadmium oxide base room-temperature rare magnetic semiconductor nano material doped with nickel ion and preparation method thereof

A technology of dilute magnetic semiconductors and nanomaterials, applied in the fields of dielectric physics and magnetic physics, can solve the problems of poor reproducibility of the preparation process, complex preparation methods of cadmium oxide, and difficult control of phase formation.

Inactive Publication Date: 2008-12-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to previous studies and reports, cadmium oxide has disadvantages such as complicated preparation methods, difficult control of phase formation, and poor reproducibility of the preparation process.
Especially the research on cadmium oxide-based dilute magnetic semiconductor nanomaterials doped with transition metal ions has rarely been reported so far.

Method used

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  • Cadmium oxide base room-temperature rare magnetic semiconductor nano material doped with nickel ion and preparation method thereof
  • Cadmium oxide base room-temperature rare magnetic semiconductor nano material doped with nickel ion and preparation method thereof
  • Cadmium oxide base room-temperature rare magnetic semiconductor nano material doped with nickel ion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1: Ni ion-doped CdO-based dilute magnetic semiconductor nanomaterial with a molar doping ratio of 15%

[0082] raw material:

[0083] Nickel acetate [Ni(CH 3 COO) 2 4H 2 O], cadmium acetate [Cd(CH 3 COO) 2 2H2 O], tetramethylammonium hydroxide [(CH 3 ) 4 N(OH)·5H 2 O] and DMSO [C 2 h 6 OS].

[0084] Preparation Process:

[0085] a. Preparation of Ni ion-doped Cd(OH) 2 Precursor sol:

[0086] Weigh 225mg of nickel acetate, 1.359g of cadmium acetate and 1.998g of tetramethylammonium hydroxide, and fully dissolve tetramethylammonium hydroxide in 25ml of ethanol; then, sequentially add nickel acetate and cadmium acetate into 50ml of dimethicone In methyl sulfoxide, use a magnetic stirrer to continuously stir for 25 minutes. After fully dissolving, add the ethanol solution of tetramethylammonium hydroxide to the dimethyl sulfoxide containing nickel acetate and cadmium acetate dropwise at a speed of 2ml / min. Then use a magnetic stirrer to continuously st...

Embodiment 2

[0096] Example 2: Ni ion-doped CdO-based dilute magnetic semiconductor nanomaterials with a molar doping ratio of 4%

[0097] raw material:

[0098] Nickel acetate [Ni(CH 3 COO) 2 4H 2 O], cadmium acetate [Cd(CH 3 COO) 2 2H 2 O], tetramethylammonium hydroxide [(CH 3 ) 4 N(OH)·5H 2 O] and DMSO [C 2 h 6 OS].

[0099] Preparation Process:

[0100] a. Preparation of Ni-doped Cd(OH) 2 Precursor samples:

[0101] Weigh 60mg of nickel acetate, 1.547g of cadmium acetate and 1.998g of tetramethylammonium hydroxide, and add tetramethylammonium hydroxide to fully dissolve in 25ml of ethanol; then, add nickel acetate and cadmium acetate into 50ml of di In the methyl sulfoxide solvent, continue to stir with a magnetic stirrer for 30 minutes. After fully dissolving, the ethanol solution of tetramethylammonium hydroxide is added dropwise to the dimethicone containing nickel acetate and cadmium acetate at a speed of 2ml / min. The mixed solution of methyl sulfoxide was continuous...

Embodiment 3

[0107] Embodiment 3: basically the same as Embodiment 1, but the molar doping ratio of Ni ions is 1%.

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Abstract

The invention provides nickel ion-doped cadmium oxide-based room temperature diluted magnetic semiconductor nano material and the preparation method thereof. The nano material is composed of a CdO matrix, and is characterized in that the range of the mole ratio of the doped nickel ion to the CdO matrix is 1.0 to 20.0 percent. The recommended doping ratio is 2.0 to 15.0 percent, and the optimal doping ratio is 4.0 percent. The existence mode of the nickel ion-doped cadmium oxide-based diluted magnetic semiconductor nano material is the nano powder and the nano film. The nickel ion doped in the nickel ion-doped cadmium oxide-based diluted magnetic semiconductor nano material replaces the position of the crystal lattice of Cd<2+> in the matrix CdO, thereby the substitution doping is formed. The invention also provides the preparation method of the magnetic semiconductor nano material. The diluted magnetic semiconductor nano material has the advantages that the crystallization is good, and the doped nickel ion replaces the position of the crystal lattice of Cd<2+> in the CdO crystal lattice, thereby the substitution doping is formed. The prepared diluted magnetic semiconductor nano material has room temperature ferromagnetism.

Description

technical field [0001] The invention belongs to the fields of dielectric physics and magnetic physics, and relates to a dilute magnetic semiconductor nanometer material with semiconductor properties and room temperature ferromagnetism and a preparation method thereof. Specifically, the present invention relates to nickel ion-doped cadmium oxide (CdO)-based room temperature dilute magnetic semiconductor nanopowder and nanofilm and their corresponding preparation methods. Background technique [0002] Diluted magnetic semiconductors are a type of semiconductor material that obtains ferromagnetism through metal ion doping, in which doped metal ions (such as Mn, Fe, Co, Ni, etc.) partially replace the cations in the semiconductor lattice, and the localized spin passes through Some indirect coupling mechanism (such as carrier-mediated coupling) produces ferromagnetic order. In addition to the basic characteristics of traditional semiconductors, dilute magnetic semiconductors als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/40C01G11/00C23C30/00C23C18/02
Inventor 袁岂凡万建国王广厚
Owner NANJING UNIV
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