Method for manufacturing multilayer nanowires by template electrochemical synthesis technology

Abstract

The invention relates to a method for manufacturing multilayer nanowires by a template electrochemical synthesis technology. Three plating baths are adopted, and a three-electrode system is utilized for performing control-potential deposition; a secondary anodised aluminum film electrode is put into the NiFe plating bath, control-potential deposition is carried out on NiFe alloy, the NiFe alloy is ultrasonically cleaned and is rapidly converted into the Cu plating bath, control-potential deposition is carried out on Cu, the Cu is ultrasonically cleaned and then is rapidly converted into the Co plating bath, control-potential deposition is carried out on Co, the Co is ultrasonically cleaned and is rapidly converted into the Cu plating bath, control-potential deposition is carried out on Cu, control-potential deposition of the NiFe, the Cu, the Co and the CU is taken as one period and repeated, and the NiFe/Cu/Co/Cu multilayer nanowires are obtained. The manufactured NiFe/Cu/Co/Cu spin-valve multilayer nanowires are good in GMR effect, a high-density magnetic random access memory, a GMR magnetic reading head, a high-sensitivity magnetic sensor and the like can be manufactured, and the method has the wide application prospect in the fields of information memory, automatic measuring and the like.

Description

technical field [0001] The invention belongs to the field of metal nanomaterials, and in particular relates to a method for preparing multilayer nanowires using template electrochemical synthesis technology; using a secondary anodic aluminum oxide film (AAO) as a template, by controlling the deposition potential, electrolytic synthesis in a three-electrolytic cell Deposit NiFe / Cu / Co / Cu multilayer nanowires. The method is low in price, convenient in preparation, and has uniform and controllable diameters of nanowires. Background technique [0002] At present, the methods used to prepare nano-multilayer wires mainly include molecular beam epitaxy, microlithography, nanolithography, and template method. commercial production. The template method combined with electrodeposition technology has simple equipment, is easy to operate, can be carried out at room temperature and pressure, is low in cost, and is easy to realize industrial production. It is an exquisite chemical method...

AI Technical Summary

Problems solved by technology

In this method, when the Co layer and the Cu layer are deposited in the same electrolytic cell by controlling the potential, since the deposition potential of Co is negative to that of Cu, although the Cu main salt concentration in the Cu / Co / Cu electrolytic cell is very low, it is inevitable The Co magnetic layer contains about 2wt% Cu, which affects the magnetic properties of multilayer nanowires and reduces the GMR performance.

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