Effect of Zr Addition on Magnetostriction of Tb-Dy-Fe Alloys Prepared by Micro-Pulling-Down Method

Abstract:

Effects of Zr addition and annealing on the magnetostriction of Tb-Dy-Fe alloy crystals were investigated. The (Fe_1.9Tb_0.27Dy_0.73)_1-xZr_x (x: 0, 0.0125, 0.025, 0.05, 0.075) crystal fibers about 2 mm in diameter were grown by the micro-pulling-down (μ-PD) method. The grown crystals showed the low chemical segregation along longitudinal direction and the growth direction was oriented in the <311> direction. The saturation magnetostriction of the fiber increases with increasing the Zr content, annealing temperature and annealing time. The fiber-shape Tb-Dy-Fe crystals prepared by the μ-PD method are promising for the applications as sensors and actuators.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 2497-2502
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.2497
• Online since: May 2014
• Authors: Katsunari Oikawa*, Tetsuo Shoji, Koichi Anzai
• Keywords: Giant Magnetostriction, Microstructure, Segregation, Single Crystal

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