Growth of Fe-Ga Alloy Single Crystals by the Czochralski Method and Their Application to Vibration Power Generator

Author

Fujieda, Shun ; Suzuki, Satoshi ; Minato, Atsushi ; Fukuda, Toshio ; Ueno, Tomohiro

Author_Institution

Inst. of Multidiscipl. Res. for Adv. Mater., Tohoku Univ., Sendai, Japan

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

An Fe-Ga alloy single crystal of about 10 mm in diameter and about 60 mm in length was grown by the Czochralski (CZ) method. The as-grown ingot was approximately oriented in the 〈100〉 direction parallel to the pull-up direction. The gallium concentration of the as-grown ingot was close to that of the starting polycrystalline alloy. The magnetostriction of about -212 ppm was observed in the 〈100〉 direction by applying a magnetic field perpendicular to the measured direction. In addition, the superior performance of vibration power generation due to the large inverse magnetostrictive effect was demonstrated by a prototype device using the as-grown Fe-Ga alloy single crystal. It is concluded that Fe-Ga alloy single crystals grown by the CZ method are promising for application to vibration power generators.

Keywords

crystal growth from melt; electric generators; gallium alloys; iron alloys; magnetostriction; (100) direction; Czochralski method; Fe-Ga; Fe-Ga alloy single crystals growth; gallium concentration; large inverse magnetostrictive effect; pull-up direction; vibration power generation; vibration power generator; Crystals; Gallium; Magnetostriction; Saturation magnetization; Vibrations; Electron backscatter diffraction (EBSD); Galfenol; energy harvesting; inverse magnetostrictive effect; magnetostriction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2331139

Filename

6971570