Magnetic memory material of compound structure of FePt nano-particle monolayer film and B4C and method of producing the same

A nanoparticle and single-layer film technology, which is applied in metal material coating process, coating, ion implantation plating, etc. Disappearance and other problems, to achieve high integration, improve recording density, and good stability

Inactive Publication Date: 2009-04-08
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In computer hard disks, the use of magnetic particles as data storage units has the following problems: as the volume of the unit magnetic recording unit decreases, the ambient temperature will lead to the disappearance of magnetism,...

Method used

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  • Magnetic memory material of compound structure of FePt nano-particle monolayer film and B4C and method of producing the same
  • Magnetic memory material of compound structure of FePt nano-particle monolayer film and B4C and method of producing the same
  • Magnetic memory material of compound structure of FePt nano-particle monolayer film and B4C and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. 0.5 mmol of platinum acetylacetonate, 2 mmol of Fe(CO) 5 , 1 mmol of oleic acid and 1 mmol of oleylamine are mixed and dissolved in 20 milliliters of benzyl alcohol, stirred and heated under nitrogen, and the solution is heated to 200 degrees at a rate of 5 degrees per minute, and kept at this temperature for reaction Monodisperse iron-platinum nanoparticles were prepared in 2 hours.

[0024] 2. After the solution is cooled to room temperature, pour 40 ml of absolute ethanol into the solution, ultrasonically oscillate for 5 minutes, pour it into a centrifuge tube, and centrifuge at a speed of 10,000 rpm. Pour off the brown supernatant after centrifugation, and put The black precipitate in the tube was dissolved in 15 ml of hexane. Add the same volume of absolute ethanol and centrifuge under the same conditions, and dissolve the obtained black precipitate into 10 ml of hexane, then wash once with hexane and alcohol under the same conditions, and disperse the iron-pla...

Embodiment 2

[0029] 1. 0.5 mmol of platinum acetylacetonate, 2 mmol of Fe(CO) 5 , 2 millimoles of oleic acid and 2 millimoles of oleylamine are mixed and dissolved in 20 milliliters of benzyl alcohol, stirred and heated under nitrogen conditions, the solution is heated to 200 degrees at a rate of 5 degrees Celsius per minute, and this temperature is maintained for reaction Monodisperse iron-platinum nanoparticles were prepared in 2 hours.

[0030] 2. After the solution is cooled to room temperature, pour 20 ml of absolute ethanol into the solution, ultrasonically oscillate for 5 minutes, pour it into a centrifuge tube, and centrifuge at a speed of 5000 rpm, pour off the brown supernatant after centrifugation, and put The black precipitate in the tube was dissolved in 15 ml of hexane. Add the same volume of absolute ethanol and centrifuge under the same conditions, and dissolve the obtained black precipitate into 10 ml of hexane, then wash once with hexane and alcohol under the same condit...

Embodiment 3

[0035] 1. 0.5 mmol of platinum acetylacetonate, 2 mmol of Fe(CO) 5 , 4 millimoles of oleic acid and 4 millimoles of oleylamine are mixed and dissolved in 20 milliliters of benzyl alcohol, stirred and heated under nitrogen conditions, the solution is heated to 200 degrees Celsius at a rate of 5 degrees Celsius per minute, and this temperature is maintained for reaction Monodisperse iron-platinum nanoparticles were prepared in 2 hours.

[0036] 2. After the solution is cooled to room temperature, pour 30 ml of absolute ethanol into the solution, ultrasonically oscillate for 5 minutes, pour into a centrifuge tube, and centrifuge at a speed of 3000 rpm. Pour off the brown supernatant after centrifugation, and remove the black color in the tube. The precipitate was dissolved in 15 mL of hexane. Add the same volume of absolute ethanol and use the same conditions to dissolve the obtained black precipitate into 10 ml of hexane, then wash it once with hexane and alcohol under the same...

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Abstract

The invention provides a magnetic recording material compounded by iron-platinum nano-particle self-assembly monofilm and B4C and a preparation method thereof. The preparation method comprises the following steps: the mono-disperse nanometer FePt particles with adjustable grain diameters are spread on an inorganic material substrate to form a self-assembly monofilm structure, a B4C protective layer with thickness of 10-50 nanometers is sputtered on the monofilm by the magnetron sputtering technology, and the B4C protective layer covers and protects the iron-platinum nano-particle monofilm; after high temperature annealing, the complex film magnetic recording material formed by the FePt nano-particles with magnetic phase transition and stable self-assembly is formed. The material has the advantages of good stability, high coercive force, high integration, high repeatability, and the like, which can greatly improve recording density.

Description

technical field [0001] The invention relates to a preparation process of a monodisperse (standard deviation σ<10% of particle size) FePt nanometer monolayer film, and a method for protecting and stabilizing FePt nanometer in the monolayer film during high-temperature annealing phase transition. belongs to the field of nanotechnology. technical background [0002] In today's society where technology is developing day by day, people put forward higher and higher requirements for information storage capacity. In particular, the wide application of multimedia means including music, video, and high-definition movies at present often requires the storage of massive amounts of information. The recording density of computer hard disks manufactured based on conventional magnetic storage technology can only reach about 40GB per square inch, which cannot fully meet the development needs of the information society. Using the AFC (Anti Ferromagnetically Coupled) technology invented ...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/06C23C14/02C23C14/58
Inventor 王浩汪汉斌杨辅军
Owner HUBEI UNIV
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