Megnetostriction and Terfenol-D

Graeme Dewar

doi:10.1117/12.390573

30 June 2000 Megnetostriction and Terfenol-D

Graeme Dewar

Proceedings Volume 4097, Complex Mediums; (2000) https://doi.org/10.1117/12.390573
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

In this talk, which is tutorial in nature, I present a review of the phenomenon of magmetostriction in magnetic materials. Magnetostriction has its origin in the spin-orbit coupling of the electrons responsible for the magnetization. Terfenol-D (Dy_0.73Tb_0.27Fe_1.95) has such an enormous magnetostriction parameter that is has acquired smart material status. Suitably oriented crystals have strain changes of approximately equals 0.2% when the magnetization direction is rotated by 90 degree(s). Devices based on t his material include microphones, inch-worm motors, actuators, etc. On a fundamental level, magnetostriction provides an interation mechanism between photons and phonons. Calculations and experimental data for 17 GHz microwave reflection and transmission measurements are presented. Finally, possible experiments at optical frequencies are suggested.

Citation Download Citation

Graeme Dewar "Megnetostriction and Terfenol-D", Proc. SPIE 4097, Complex Mediums, (30 June 2000); https://doi.org/10.1117/12.390573

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