TDK Corporation announced the delivery of prototype hard disk heads using new MAS-MAMR (Microwave Assisted Switching-Microwave Assisted Magnetic Recording) magnetic recording technology developed jointly with Toshiba R&D Center and Toshiba Electric Devices and Storage. MAS-MAMR is an enhanced version of MAMR technology that can significantly increase data density.
First, let’s recall that MAMR technology implies that during the recording process, a special microwave generator in the HDD recording head overcomes the coercive force of the magnetized recording area on the disk (magnetic domain) and changes its magnetization to the required . The prefix MAS means an even stronger effect of the microwave radiator on the recording area on the magnetic disk, which allows the track width to be significantly reduced. The technology allows the effect of strong magnetic vibration to occur between the spin-torque generator (spin-torque oscillator, STO) and the magnetic recording medium. The industry’s first STO-based recording technology was also developed by TDK and is already used in Toshiba’s 18GB hard drives, which began production last year.
The MAS-MAMR technology will use second generation STO heads. It will be used in hard drives with a capacity of more than 24 TB. Technology uses the effect Ferromagnetic Resonance of two layers of STO elements arranged in the recording head.
In collaboration with Toshiba and the SDK, TDK has shown that current magnetic disk recording capabilities can be improved. TDK investigates the optimal bi-element structure that can be used to write MAS-MAMR. This technology is to be used in the production of 30 TB hard drives.