Interpretation of the magnetization mechanism in Terfenol-D using Barkhausen pulse-height analysis and irreversible magnetostriction

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344707· OSTI ID:6950171

Jiles, D C ^[1]; Hariharan, S ^[2]

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1. Ames Laboratory, Iowa State University, Ames, Iowa 50011 (USA)
2. Department of Electrical Engineering, Iowa State University, Ames, Iowa 50011 (USA)

The ternary alloy Dy{sub 0.7}Tb{sub 0.3}Fe{sub 1.9}, known as Terfenol-D, is a highly magnetostrictive alloy with magnetostriction coefficients along the principal crystallographic directions of {lambda}{sub 111}=1640{times}10{sup {minus}6} and {lambda}{sub 100}{le}100({plus minus}30){times}10{sup {minus}6}. The bulk magnetostriction {lambda} is dependent on the state of magnetization {ital M}, on the original domain configuration, and on the texture of the material. This paper reports on Barkhausen measurements and magnetostriction. The pulse-height distribution of Barkhausen emissions revealed events occurring at a specific amplitude which were stress dependent. The magnetostriction results gave a saturation magnetostriction in excess of 2000 {mu} strain.

• OSTI ID: 6950171
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
DOMAIN STRUCTURE
DYSPROSIUM ALLOYS
IRON ALLOYS
IRREVERSIBLE PROCESSES
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETOSTRICTION
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
TERBIUM ALLOYS
TEXTURE