APPLIED PHYSICS: Muffling Magnetic Ringing

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Science  31 May 2002:
Vol. 296, Issue 5573, pp. 1571d
DOI: 10.1126/science.296.5573.1571d

The storage state of binary information in magnetic elements is distinguished by the orientation of the magnetization, which can be switched by application of a magnetic field pulse. However, at both onset and offset of the pulse, the magnetization oscillates, or rings. With the decreasing size of magnetic elements and the increasing demand for faster switching rates, ringing is problematic and presents a limiting factor in switching speed. In a system in which the magnetization precesses around a static magnetic field in response to a magnetic pulse that lasts for about a nanosecond, Schumacher et al. show that the ringing can be suppressed by adjusting the pulse duration to match the natural frequency of precession. This coherent suppression may allow the development of devices with stable and ultrafast magnetization reversal. — ISO

Appl. Phys. Lett. 80, 3781 (2002).

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