Anomalous thermal expansion and magnetostriction of single crystal Tb.27Dy.73Fe2

Author

Abbundi, R. ; Clark, A.E.

Author_Institution

Naval Surface Weapons Center, White Oak, Silver Spring, Maryland

Volume

13

Issue

5

fYear

1977

fDate

9/1/1977 12:00:00 AM

Firstpage

1519

Lastpage

1520

Abstract

Single crystal magnetostriction and thermal expansion measurements are reported on Tb.27Dy.73Fe2. A spin reorientation at T = 283K causes the sudden onset of a very large magnetostrictive distortion which yields a huge anomalous contribution to the linear thermal expansion. The temperature and magnitude of this contribution is field controlled. The expansion coefficient $d(\\Delta \\ell /\\ell )/dT$ can be varied from +5 to +115×10^-6/°K. Normal magnetostrictive behavior is observed above 283K. Below this temperature a change in the easy axis from the highly magnetostrictive [111] axis to the weakly magnetostrictive [100] direction causes an anomalous field dependence. Here large external fields are required to saturate the moment along [111].

Keywords

Magnetic thermal factors; Magnetostriction; Rare-earth materials/devices; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic field measurement; Magnetosphere; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature dependence; Temperature sensors; Thermal expansion;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1977.1059598

Filename

1059598