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Japan has successfully developed the world's smallest magnetic particle

it is reported that the University of Tokyo recently announced the successful development of the world's smallest nano (nm) permanent magnet ferrite. According to the journal industry on October 7, the research team led by Professor Kenichi otsuo of the Department of science, University of Tokyo announced on October 6 that it had successfully developed the world's smallest nano-1.8 permanent ferrite in the continuous loading process (nm). The magnetic particles formed by iron oxide are low-cost and can be produced in large quantities. They can be used to manufacture large capacity tapes for storing big data and color magnetic particles for printers. The results have been published in the electronic edition of the British journal Science

smallest magnetic particle

the successfully developed magnetic particle is called type iron oxide nano magnetic particle, and the size of the particle is nano. While mastering the particle system synthesis technology, the research group also verified that the magnetic particles above 7.5 nm have the characteristics of ferromagnetic phase transition. Generally, magnetic storage media such as high-capacity magnetic tapes and hard disks require more than 3000 oerst. Baoji'nan Shijin is a well-known enterprise magnetic force independently developed and produced in China. The newly developed 8-nanometer magnetic particles can achieve 5000 oerst, which can be completely used for ultra-high density magnetic storage media. Nanoscale permanent ferrite also has the characteristics of self generated polarization, and can become the smallest multiferroic ferrite particle at present

it is reported that ferrite magnets are magnetic materials with iron oxide as the main component, which can be used to make permanent magnets and magnetic storage. The test principle is still pulse reflection media, electromagnetic wave absorbing materials, etc. In the past, it was generally believed that magnetic particles cannot maintain magnetism if their diameter is too small. This is the first time to successfully develop hard ferrite with a diameter of less than 10 nm

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