Schematic of the thermal spin-torque heat-assisted magnetic recording (TST-HAMR) (IMAGE)

National Institute for Materials Science, Japan

Schematic of the thermal spin-torque heat-assisted magnetic recording (TST-HAMR)

Caption

Laser heating generates a temperature gradient in the MnPt layer, which induces spin currents (green arrows) that are injected into the FePt layer. These spin currents generate spin torque, which assists in magnetization reversal. While conventional HAMR relies solely on thermally induced changes in magnetization, this study demonstrates that spin currents can serve as an additional means of controlling magnetization.

Credit

Shinji Isogami, National Institute for Materials Science; Yichun Fan, Seagate Technology

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