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Proceedings Paper

Megnetostriction and Terfenol-D
Author(s): Graeme Dewar
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Paper 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 (Dy0.73Tb0.27Fe1.95) 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.

Paper Details

Date Published: 30 June 2000
PDF: 11 pages
Proc. SPIE 4097, Complex Mediums, (30 June 2000); doi: 10.1117/12.390573
Show Author Affiliations
Graeme Dewar, Univ. of North Dakota (United States)

Published in SPIE Proceedings Vol. 4097:
Complex Mediums
Akhlesh Lakhtakia; Werner S. Weiglhofer; Russell F. Messier, Editor(s)

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