MAGNETIC SENSOR USING SPIN TRANSFER TORQUE DEVICES
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United States of America Patent
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Issued Date -
May 22, 2014
app pub date -
Nov 16, 2012
filing date -
Nov 16, 2012
priority date (Note) -
Abandoned
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Abstract
The present invention is directed to a magnetic sensor using a spin transfer torque device, including a spin transfer torque device configured such that the magnetization direction thereof is varied by current, a bipolar pulse source configured to apply bipolar pulses to the spin transfer torque device in order to control the coercive field and sensitivity of the spin transfer torque device, and a signal processing unit configured to calculate magnetic susceptibility or magnetic resistance by counting the parallel (P) or anti-parallel (AP) states of the spin transfer torque device in response to the applied bipolar pulses.
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