Energy-assisted magnetic recording

Energy-assisted magnetic recording (EAMR) is a disk drive recording technology which use energy (microwaves - MAMR or heat - HAMR) to increase the areal density (a higher BPI value) during writing operations by improving writability. [1][2][3] To lower the resistance of the storage medium for having its polarity changed (high coercivity), energy is applied on the recording head: electrical current in ePMR (energy-assisted perpendicular magnetic recording), a laser source for heating temporarily the disk material (HAMR), a spin-torque oscillator (STO) for microwaves (MAMR).[4][5][2][6][7]

  1. ^ Gleitsmann, Nina (June 28, 2021). "Increased storage capacity through EAMR - Western Digital delivers the future for your hard drive".
  2. ^ a b "HAMR vs. MAMR, and the future of high-capacity hard drives | TechTarget". Storage.
  3. ^ "Energy-Assisted Magnetic Recording | 6 | Ultra-High-Density Magnetic R".
  4. ^ Paul, Ian (August 5, 2020). "What Is an EAMR Hard Drive, and How Does It Work?". How-To Geek.
  5. ^ S, Ganesh T. "Western Digital's 16TB and 18TB Gold Drives: EAMR HDDs Enter the Retail Channel". www.anandtech.com.
  6. ^ "What Is Microwave-assisted Magnetic Recording (MAMR)? | Pure Storage". www.purestorage.com.
  7. ^ https://ieeexplore.ieee.org/document/9918540