M. Yamaguchi et al., Directivity and sensitivity of high-frequency carrier type thin-film magnetic field sensor, SENS ACTU-A, 81(1-3), 2000, pp. 102-105
We discuss the directivity and sensitivity of high-frequency carrier type t
hin-film magnetic sensor (or so-called MI sensor.) Inductance of the sensor
was proportional to cos(3)theta, where theta is an angle between the appli
ed magnetic field direction and the length direction of the sensor. If the
length of the sensor is bigger than its thickness and width, the intensity
of effective magnetic field inside the Magnetic thin film was proportional
to H(dc)cos theta, where H-dc is the applied external de field. A high sens
itivity of 2 x 10(-4) Oe was obtained when a 140 MHz carrier current was ap
plied and the signal was detected by a lock-in amplifier. (C) 2000 Elsevier
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