Researchers have studied the operation of a small device fabricated in the write gap of a hard disk drive’s write head to extend its recording density. The device is based on microwave-assisted magnetic recording. This technology, reported in Journal of Applied Physics, uses a spin-torque oscillator, which causes the magnetic particles of the recording medium to wobble. This makes them much easier to flip over when the write head applies a recording magnetic field in the writing process.
The development of a new method to make non-volatile computer memory may have unlocked a problem that has been holding back machine learning and has the potential to revolutionize technologies like voice recognition, image processing and autonomous driving.