Iron-cobalt-tantalum perpendicular magnetic recording material, as a new type of perpendicular magnetic recording material, will have a broad development prospect in the future high-density recording. The recording forms of magnetic recording materials are divided into three types: ① Longitudinal magnetic recording materials, in which the magnetization direction of signals recorded on the surface of the magnetic layer is consistent with the moving direction of the recording materials, such as recording tapes, etc. ② Transverse magnetic recording material, the magnetization direction of the signal recorded on the surface of the magnetic layer is perpendicular or close to perpendicular to the moving direction of the recording material, such as video tape, etc. ③ Vertical magnetic recording material, the magnetization direction of the signal recorded on the surface of the magnetic layer is perpendicular to the surface of the recording material, such as magneto-optical disk. With the development of magnetic recording materials, the recording wavelength has been shortened from 1000μm to less than 1μm, and Hc has been increased from 102Oe to more than 103Oe. Oxide magnetic powder and alloy magnetic powder are the most widely used materials.
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