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Magnetomechanical damping by polycrystalline TbDy

Good, N. and Dooley, J. and Fultz, B. (2002) Magnetomechanical damping by polycrystalline TbDy. Journal of Applied Physics, 91 (10). pp. 7824-7826. ISSN 0021-8979. doi:10.1063/1.1452217.

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Vibration damping in polycrystalline TbDy alloys was studied at cryogenic temperatures. Mechanical hysteretic losses were measured at various strains, frequencies, and loading configurations at 77 K. Some textured TbDy materials demonstrated 22.6% energy dissipation in mechanical measurements at low frequency (0.01 Hz) and a mean logarithmic decrement of 0.23 at a higher frequency (25 kHz). Ultrasonic velocities of longitudinal and shear elastic waves were measured on single and polycrystalline TbDy; little variation in ultrasonic velocities was found even for samples with large variation in crystallographic texture and magnetomechanical properties.

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Fultz, B.0000-0002-6364-8782
Additional Information:© 2002 American Institute of Physics. The authors thank Dr. A. E. Clark for stimulating discussions, Dr. M. Wun-Fogle for the use of several single crystal specimens, and Dr. T. Lograsso for preparing the ingots. The authors acknowledge support from NASA’s Microgravity Division. The Jet Propulsion Laboratory is operated by the California Institute of Technology under contract with NASA.
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Subject Keywords:terbium alloys; dysprosium alloys; magnetoelastic waves; magnetic hysteresis; cold rolling; texture; internal stresses; ultrasonic velocity; magnetostriction; ferromagnetic materials
Issue or Number:10
Record Number:CaltechAUTHORS:GOOjap02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4216
Deposited By: Tony Diaz
Deposited On:08 Aug 2006
Last Modified:08 Nov 2021 20:15

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