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Ferrimagnetism semimetal NaCu3Fe2Os2O12 and preparation method thereof

A nacu3fe2os2o12, ferrimagnetic technology, applied in ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, magnetic materials, magnetic objects, etc., can solve the problems of low spin-polarized electron efficiency and low spin-electron efficiency

Active Publication Date: 2017-09-15
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been theoretically demonstrated that the efficiency of injecting spin-polarized electrons from a ferromagnetic material with a lower resistivity to a semiconductor material with a higher resistivity is less than 2%
Resistivity mismatch and low spintronic polarizability of ferromagnetic metals are direct causes of low spintronic injection efficiency

Method used

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  • Ferrimagnetism semimetal NaCu3Fe2Os2O12 and preparation method thereof
  • Ferrimagnetism semimetal NaCu3Fe2Os2O12 and preparation method thereof
  • Ferrimagnetism semimetal NaCu3Fe2Os2O12 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] NaOH, Fe with a purity higher than 99.9% 2 O 3 , CuO, Os and KClO 4 They were mixed in a molar ratio of 1:1:3:2:1.5, and ground in an argon-filled glove box for 30 minutes to obtain a mixture with a particle size of 200 mesh. The mixture was filled and sealed in gold capsules with a wall thickness of 0.1 mm. The gold capsules are placed in a six-sided top press, and under the conditions of a pressure of 8 GPa and a temperature of 1100° C., the raw materials in the gold capsules are reacted for 30 minutes to obtain a reaction product. After the temperature dropped uniformly to room temperature within 2 hours, the reaction product was taken out of the gold capsule and ground again. NaCu was obtained by washing with deionized water 3 Fe 2 Os 2 O 12 .

[0042] In this example, KClO 4 As an oxygen source, it is used to provide O atoms. Deionized water was used to remove KCl entrapped in the reaction product.

Embodiment 2

[0044] NaOH, Fe with a purity higher than 99.9% 2 O 3 , CuO, Os, and NaClO 4 They were mixed in a molar ratio of 1:1:3:2:1.5, and ground in an argon-filled glove box for 30 minutes to obtain a mixture with a particle size of 200 mesh. The mixture was filled and sealed in platinum capsules with a wall thickness of 0.1 mm. The platinum capsules are placed in a six-sided top press, and the raw materials in the gold capsules are reacted for 30 minutes under the conditions of a pressure of 8 GPa and a temperature of 1100° C. to obtain a reaction product. The heating power was directly cut off, and after the temperature dropped to room temperature within 15 seconds, the reaction product was taken out from the platinum capsule and ground again. NaCu was obtained by washing with deionized water 3 Fe 2 Os 2 O 12 .

[0045] In this example, NaClO 4 As an oxygen source, it is used to provide O atoms. Deionized water was used to remove NaCl contained in the reaction product.

Embodiment 3

[0047] NaOH, Fe with a purity higher than 99.9% 2 O 3 , CuO, Os and KClO 4 The mixture was mixed in a molar ratio of 1:1:3:2:1.375, and ground in an argon-filled glove box for 60 minutes to obtain a mixture with a particle size of 500 mesh. The mixture was filled and sealed in gold capsules with a wall thickness of 0.1 mm. The gold capsules are placed in a six-sided top press, and the raw materials in the gold capsules are reacted for 10 minutes under the conditions of a pressure of 6 GPa and a temperature of 1200° C. to obtain a reaction product. After the temperature dropped uniformly to room temperature within 10 hours, the reaction product was taken out of the gold capsule and ground again. NaCu was obtained by washing with deionized water 3 Fe 2 Os 2 O 12 .

[0048] In this example, KClO 4 As an oxygen source, it is used to provide O atoms. Deionized water was used to remove KCl entrapped in the reaction product.

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Abstract

The invention discloses a ferrimagnetism semimetal. The chemical formula of the ferrimagnetism semimetal is NaCu3Fe2Os2O12, the space group is Pn-3, the lattice constant is as shown in the specification, and the Curie temperature is 380 K. The ferrimagnetism semimetal is a high-temperature ferrimagnetism semimetal. The invention further discloses a preparation method for the ferrimagnetism semimetal. The preparation method comprises the following steps: (1) grinding and mixing NaOH, Fe2O3, CuO, Os and an oxygen source, to obtain a mixture; (2) filling the mixture in a gold or platinum capsule, sealing; (3) processing the gold or platinum capsule in 6-10 GPa of the pressure and 1000-1200 DEG C of the temperature; and (4) cooling a reaction product obtained in the step (3) to be the room temperature, releasing the pressure, and taking out from the gold or platinum capsule, grinding and washing, to obtain the ferrimagnetism semimetal NaCu3Fe2Os2O12. The ferrimagnetism semimetal NaCu3Fe2Os2O12 has the high Curie temperature, and has the potential application value in a future spinning electron device.

Description

technical field [0001] The invention relates to the field of material synthesis, in particular to a ferrimagnetic semi-metal NaCu 3 Fe 2 O s 2 O 12 and its preparation method. Background technique [0002] The present and future is a society dominated by information, and the processing, transmission and storage of information will require unprecedented scale and speed. Semi-metallic materials of large-scale integrated circuits and high-frequency devices play an important role in information processing and transmission, in which they make great use of the charge properties of electrons; while information storage in information technology (such as magnetic tapes) , optical discs, hard disks, etc.) are made of magnetic materials, which mainly use the spin properties of electrons. However, the research and application of electron charge and spin properties are basically developed independently of each other. If the charge and spin properties of electrons can be used at the...

Claims

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Application Information

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IPC IPC(8): C01G55/00H01F1/40
CPCC01G55/002C01P2002/34C01P2002/72C01P2006/42H01F1/408
Inventor 龙有文王潇殷云宇
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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