Magnetostriction of TbDy single crystals under compressive stress

Author

Spano, M.L. ; Clark, A.E. ; Wun-Fogle, M.

Author_Institution

US Naval Surface Warfare Center, Silver Spring, MD, USA

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1751

Lastpage

1753

Abstract

Linear magnetostriction, magnetization, and Young´s modulus were measured in a b-axis single-crystal rod of Tb_0.5Dy _0.5. Huge magnetostrictions reaching 0.5-0.6% in fields of 2000 Oe were observed at 77 K. Three magnetization regions can be distinguished: (1) a low field region where the magnetization process is dominated by moment rotation; (2) a region where the magnetization jumps from one easy direction (a-axis) to another closer to the applied field direction; and (3) a slow approach to saturation as the applied field pulls the magnetization into the hard b-axis direction. The crossover from one region to another is determined by the applied stress and the demagnetization factor. A simple theory explaining each process is presented

Keywords

Young´s modulus; demagnetisation; dysprosium alloys; magnetisation; magnetostriction; terbium alloys; 77 K; Tb_0.5Dy_0.5; Young´s modulus; a-axis; applied field direction; applied stress; b-axis; compressive stress; crossover; demagnetization factor; easy direction; linear magnetostriction; low field region; magnetization; moment rotation; saturation; single crystals; slow approach; Coils; Compressive stress; Crystals; Iron; Magnetic field induced strain; Magnetic field measurement; Magnetic flux; Magnetostriction; Saturation magnetization; Voltmeters;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104512

Filename

104512