DocumentCode :
955901
Title :
Magnetomechanical coupling and ΔE effect in highly magnetostrictive rare earth - Fe2 compounds
Author :
Savage, H.T. ; Clark, A.E. ; Powers, J.M.
Author_Institution :
Naval Surface Weapons Center, Silver Spring, Maryland
Volume :
11
Issue :
5
fYear :
1975
fDate :
9/1/1975 12:00:00 AM
Firstpage :
1355
Lastpage :
1357
Abstract :
We have measured the magnetomechanical coupling in highly magnetostrictive Tbx Dy1-x Fe2-δ as a function of bias field, x, and δ. We find a peak coupling factor of 0.6 at x = .26 and bias field of 180 Oe; the largest reported for a magnetostrictive material. The corresponding material Q is 200. Because of the high magnetostriction, relative permeabilities are necessarily low; 
. Young\´s modulus at constant field changes from 4.5 to ll (x1010n/m2) as the bias changes from zero to 4.5 kOe, corresponding to a change in sound velocity >50%. The magnetomechanical coupling factor was also evaluated for 
. When δ is non-zero a eutectic second phase is present which acts as a toughening agent.
. Young\´s modulus at constant field changes from 4.5 to ll (x1010n/m2) as the bias changes from zero to 4.5 kOe, corresponding to a change in sound velocity >50%. The magnetomechanical coupling factor was also evaluated for . When δ is non-zero a eutectic second phase is present which acts as a toughening agent.Keywords :
Magnetostriction; Rare-earth materials/devices; Coils; Couplings; Iron; Magnetic anisotropy; Magnetic flux; Magnetic materials; Magnetoelasticity; Magnetostriction; Perpendicular magnetic anisotropy; Sea measurements;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1975.1058791
Filename :
1058791
Link To Document :
