Magnetoelastic coupling in paramagnetic dysprosium

Conference · Wed Jan 01 04:00:00 EST 1975 · AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 651-652

OSTI ID:4200471

Kale, B M; Donoho, P L; Pinatti, D G; Ferreira, O

The dependence of the elastic constants c$sub 11$ and c$sub 33$ on temperature and applied magnetic field was measured for single-crystal paramagnetic dysprosium, in an effort to determine the magnetoelastic coupling constants. Magnetostrictive corrections were made. The magnetoelastic coupling constants, following the theory of Southern and Goodings, are considerably larger then expected; those estimated from the static magnetostriction results of Clark et al. are smaller by a factor of about 20. A possible reason for this large difference between the statically and dynamically determined values for the magnetoelastic coupling constants may lie in the assumption by Southern and Goodings that the principal magnetoelastic contribution to the elastic constants arises from the inclusion of the nonlinear terms in the conventional definition of the finite strain tensor in the lowest order terms of the magnetoelastic Hamiltonian. (auth)

• Research Organization: Universidade Estadual de Campinas, Brazil
• NSA Number: NSA-33-003600
• OSTI ID: 4200471
• Conference Information: Journal Name: AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 651-652
• Country of Publication: United States
• Language: English

Related Subjects

*DYSPROSIUM-- MAGNETOSTRICTION
360104* --Materials--Metals & Alloys--Physical Properties
ELASTICITY
MAGNETIC FIELDS
MONOCRYSTALS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
ORIENTATION
TEMPERATURE DEPENDENCE