A multipurpose magnetometer for measuring basic magnetic characteristics with a newly designed capacitive torque sensor

Author

Lee, Y.H. ; Shin, Y.D. ; Lee, K.H. ; Kim, M.Y. ; Rhee, J.R.

Author_Institution

Dept. of Phys., Jeonbuk Nat. Univ., Jeonju, South Korea

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3397

Lastpage

3399

Abstract

An economic and versatile magnetometer for measuring basic magnetic characteristics such as hysteresis loops, magnetic anisotropy and magnetostriction with a single system was built. It is based on the principle that most magnetic characteristics could be obtained by analyzing the torque acting on a sample under an appropriate magnetic field. A capacitive torque sensor with 0.1 nJ resolution measures such torque. By limiting the duration of electromagnetic excitation only to the measuring period (about 4 s), temperature rise of the magnet becomes negligible so that a very compact and economic electromagnet and power supply (10 kg weight, 25 mm air gap, 350 W power consumption, and 480 kA/m of generated field) is realized

Keywords

capacitance measurement; magnetic anisotropy; magnetic hysteresis; magnetic variables measurement; magnetometers; magnetostriction; torque measurement; capacitive torque sensor; electromagnetic excitation; hysteresis loops; magnetic anisotropy; magnetic measurements; magnetometer; magnetostriction; Electromagnetic measurements; Magnetic analysis; Magnetic anisotropy; Magnetic field measurement; Magnetic hysteresis; Magnetometers; Magnetostriction; Perpendicular magnetic anisotropy; Power generation economics; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490394

Filename

490394