Preparation method of ferromagnetic nano wire

A technology of ferromagnetic nanowires and ferric nitrate, which is applied in chemical instruments and methods, single crystal growth, polycrystalline material growth, etc., can solve the problems of low yield and increased production cost, and achieve high magnetic coercive force, diameter and The effect of controllable length and high magnetic saturation intensity
CN101037792AInactive Publication Date: 2007-09-19TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2007-09-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention disclose a method for preparing ferromagnetic nanometer line, which belongs to the technology for preparing ferromagnetic nanometer line. The method includes the processes of: Fe(OH)3 is produced by adding sodium hydroxide or ammonia in preproduced ferric nitrate solution, then mixed with sodium chloride based on certain mass ratio and adding them in ball-mill jar, then ball milling, accordingly complex powder is produced; the said complex powder Fe(OH)3 / NaCl is reduced to Fe / NaCl by hydrogen gas at certain temperature to produce primary ferromagnetic nanometer line; pure diameter and length controlled ferromagnetic nanometer line is producing by dissolving primary ferromagnetic nanometer line in deionized water and washing by supersonic wave. The advantage of the invention is that, using sodium chloride which is easy to be eliminated with low price and without the pollution as carrier, the method is simple without the pollution, and diameter and length of ferromagnetic nanometer line is controllable, with high magnetic saturation strength and coercive force.
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Description

Technical field

[0001] The invention relates to a preparation method of ferromagnetic nanowires, which belongs to the preparation technology of ferromagnetic nanowires. Background technique

[0002] With the development of the information age, the requirements for information recording density are getting higher and higher. Although magnetic recording is the main body of current information recording, but limited by the superparamagnetism of magnetic recording materials, the traditional magnetic recording mode has gradually reached its limit of 50Gb / 6.45cm 2 . Therefore, finding new recording modes is a research topic that people pay attention to. Currently, quantum magnetic recording and magnetoelectronic recording are two typical representatives for achieving ultra-high density information recording. Among them, the recording density of magnetic nanowires can exceed 100Gb / 6.45cm 2 In addition, iron nanowires can also be used as a catalyst for the growth of...

Claims

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