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MAGNETOIMPEDANCE AND MAGNETOINDUCTANCE EFFECT IN (BiY)3(FeGa)5O12 THIN FILM

M. M. Tehranchi1, S. M. Mohseni1,*

Affiliation

  1. Laser Research Institute and Department of Physics, Shahid Beheshti University, Tehran 1983963113, Iran

Abstract

The giant magnetoimpedance (GMI) effect due to the magnetoinductance of a coil with an insulating layer of (BiY)3(FeGa)5O12 (Bi:YIG) as core is studied at different frequencies. The layer is grown by LPE (Liquid Phase Epitaxy) method on GGG (GaGd Garnet) substrate and has a thickness of 8 mm. Experimental results concerning the magnetoinductance of Bi:YIG layer at 1 kHz are also presented. The impedance of the coil changes by varying the applied magnetic field. The increase of the magnetic field decreases the magnetoinductance of the coil. The magnetoimpedance ratio can reach values of 81 % and 43 % at frequencies of 120 kHz and 250 kHz, respectively, for H = 60 Oe. Such ratio can approach to 46% at a frequency of 1 kHz for H = 50 Oe. The variation of the magnetoinductance recommends this material for applications as magneto-inductive switches..

Keywords

Magnetoimpedance, Magnetoinductance, Bi:YIG thin films, Magnetic sensors.

Submitted at: April 26, 2004
Accepted at: June 10, 2004

Citation

M. M. Tehranchi, S. M. Mohseni, MAGNETOIMPEDANCE AND MAGNETOINDUCTANCE EFFECT IN (BiY)3(FeGa)5O12 THIN FILM, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 2, pp. 667-670 (2004)