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Development of Magnetostrictive Fe-Ga and Fe-Pd Thin Films

Published online by Cambridge University Press:  01 February 2011

Teiko Okazaki ,
Satoru Watanabe ,
Norimasa Okanisi ,
Toshiro Ono ,
Yasubumi Furuya ,
Munemi Michigami ,
Yasuo Sakisaka ,
Ichiro Takeuchi  and
Manfred Wuttig
Teiko Okazaki
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Satoru Watanabe
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Norimasa Okanisi
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Toshiro Ono
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Yasubumi Furuya
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Munemi Michigami
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Yasuo Sakisaka
Affiliation:
Faculty of Science and Technology, Hirosaki University, Hirosaki 036–8561, Japan.
Ichiro Takeuchi
Affiliation:
Department of materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
Manfred Wuttig
Affiliation:
Department of materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
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Abstract

The giant magnetostrictive films exhibit promising device applications for micro-machines and sensor systems due to high response velocity and huge stress created by the magnetostriction. We developed magnetostrictive bimorph-type Fe70Pd30 or Fe83Ga17 (positive magnetostriction)/Al/Ni(negative magnetostriction) thin films by magnetron sputtering. Magnetostriction of these films measured by a bending cantilever beam method has reached 250–300 ppm in the small magnetic field of 1.0 kOe and exhibits little hysteresis. Moreover, the magnetostrictive characteristics do not change under low alternating magnetic field. The magnetoelastic coefficient of these films is 25∼30 MPa, which is comparable to the coefficient of the PbTiO3-PbZrO3 system. These metallic sensor/actuator materials are useful for applications in magnetostrictive 2D- scanners and remote-interrogated tire sensors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 855: Symposium W – Mechanically Active Materials , 2004 , W3.19
Copyright
Copyright © Materials Research Society 2005

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References

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