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

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

Research output: Contribution to journalConference articlepeer-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 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.

Original languageEnglish
Pages (from-to)102-105
Number of pages4
JournalSensors and Actuators, A: Physical
Volume81
Issue number1
DOIs
Publication statusPublished - 2000 Apr 1
EventThe 2nd European Magnetic Sensors and Actuators Conference (EMSA '98) - Sheffield, UK
Duration: 1998 Jul 131998 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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