Directivity and sensitivity of high-frequency carrier type thin-film magnetic field sensor

Masahiro Yamaguchi; M. Takezawa; H. Ohdaira; K. I. Arai; A. Haga

doi:10.1016/S0924-4247(99)00096-5

Directivity and sensitivity of high-frequency carrier type thin-film magnetic field sensor

Masahiro Yamaguchi, M. Takezawa, H. Ohdaira, K. I. Arai, A. Haga

ENG - Electrical Engineering

Research output: Contribution to journal › Conference article › peer-review

14 Citations (Scopus)

Abstract

We discuss the directivity and sensitivity of high-frequency carrier type thin-film magnetic sensor (or so-called MI sensor.) Inductance of the sensor was proportional to cos³θ, where θ is an angle between the applied 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_dccosθ, where H_dc is the applied external dc field. A high sensitivity of 2×10^-4 was obtained when a 140 MHz carrier current was applied and the signal was detected by a lock-in amplifier.

Original language	English
Pages (from-to)	102-105
Number of pages	4
Journal	Sensors and Actuators, A: Physical
Volume	81
Issue number	1
DOIs	https://doi.org/10.1016/S0924-4247(99)00096-5
Publication status	Published - 2000 Apr 1
Event	The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98) - Sheffield, UK Duration: 1998 Jul 13 → 1998 Jul 15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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AU - Yamaguchi, Masahiro

AU - Takezawa, M.

AU - Ohdaira, H.

AU - Arai, K. I.

AU - Haga, A.

PY - 2000/4/1

Y1 - 2000/4/1

N2 - We discuss the directivity and sensitivity of high-frequency carrier type thin-film magnetic sensor (or so-called MI sensor.) Inductance of the sensor was proportional to cos3θ, where θ is an angle between the applied 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 Hdccosθ, where Hdc is the applied external dc field. A high sensitivity of 2×10-4 was obtained when a 140 MHz carrier current was applied and the signal was detected by a lock-in amplifier.

AB - We discuss the directivity and sensitivity of high-frequency carrier type thin-film magnetic sensor (or so-called MI sensor.) Inductance of the sensor was proportional to cos3θ, where θ is an angle between the applied 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 Hdccosθ, where Hdc is the applied external dc field. A high sensitivity of 2×10-4 was obtained when a 140 MHz carrier current was applied and the signal was detected by a lock-in amplifier.

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Directivity and sensitivity of high-frequency carrier type thin-film magnetic field sensor

Abstract

ASJC Scopus subject areas

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