Journal
APPLIED PHYSICS EXPRESS
Volume 3, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1143/APEX.3.043002
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For the application of the spin-torque oscillator to a high-data-transfer-rate read head, it is indispensable that the oscillation frequency responds promptly to the magnetic field from recorded bits. In this paper, we numerically exemplify the phase response to a short magnetic pulse. The phase basically follows the magnetic pulse although it takes several nanoseconds to return to the steady state because of the frequency nonlinearity. We also demonstrate the differential detection of recorded bits at the data-transfer rate beyond 5 Gbit/s. (C) 2010 The Japan Society of Applied Physics
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