Transverse exchange-coupled magnetic information storage medium material and preparation method thereof

Abstract

The invention relates to a super-high density magnetic information memorizing technique, belonging to the electronic material technique field. A magnetic information memorizing unit of the invention is formed by a horizontal exchanging and coupling of high / low anisotropy constants magnetic films. When in preparation, the high anisotropy constants magnetic film is firstly prepared and then is partially modified through an ion implantation or ion diffusion process after anneal treatment to decrease the anisotropy and coercive forces of the modified part so as to form the low anisotropy constants magnetic film. Finally, the high / low anisotropy constants magnetic films are coupled along the horizontal direction to form the magnetic information memorizing medium material of the horizontal exchange coupling. The invention overcomes the defects of a vertical exchange coupling compound magnetic information memorizing medium that an enlarged distribution of the information memorizing unit switch field and a decrease of the information recording stability are caused by interface diffusion and deterioration of memorizing layer in a high temperature treatment process. The invention can further decrease the switch field of the information memorizing unit, therefore, the information recording can be more stable, so as to satisfy the requirement of the super-high density magnetic information memorizing.

Description

technical field

[0001] The invention belongs to the technical field of electronic materials, relates to a magnetic medium material applied to ultra-high density magnetic information storage, and in particular relates to solving the problem of writing information on a high anisotropy constant magnetic recording medium. Background technique

[0002] With the continuous development of the information society, human beings have higher and higher requirements for information storage, and the pursuit of higher density information storage is the eternal goal of human beings. Magnetic information storage is a main means of information storage. In the process of its high density, the size of the recorded magnetic domain is required to be smaller and smaller. When the size is small to a certain extent, the thermal motion of the magnetic domain will be irregular, that is, it will show superparamagnetism, and thus lose the recorded information. The relaxation time of the magnetic order...

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