High sensitive and heat-resistive magnetic displacement sensor using magnetorestrictive/piezoelectric laminate composite

Author

Ueno, T. ; Higuchi, T.

Author_Institution

Tokyo Univ., Japan

fYear

2005

fDate

4-8 April 2005

Firstpage

973

Lastpage

974

Abstract

A high sensitive and heat-resistive magnetic displacement sensor using a magnetostrictive/piezoelectric laminate composite is introduced. Two types of sensor are fabricated by a laminate composite of Tb-Dy-Fe (T_c: 380°C) alloy and LiNbO₃ (T_c: 1200°C) or PZT (T_c: 340°C) integrated to a magnetic circuit consisting of iron yokes and a SmCo magnet (T_c: 830°C). The temperature characteristics of sensitivity is measured. The results demonstrate heat-resistivity of the sensor inherited from the high Curie temperatures of Tb-Dy-Fe and LiNbO₃.

Keywords

Curie temperature; cobalt alloys; displacement measurement; dysprosium alloys; iron alloys; laminates; lithium compounds; magnetic circuits; magnetic materials; magnetic sensors; magnetostriction; magnetostrictive devices; piezoelectric devices; piezoelectric materials; piezoelectricity; samarium alloys; sensitivity; terbium alloys; Curie temperatures; LiNbO₃; PZT; PbZrO3TiO3; SmCo; TbDyFe; heat-resistivity; iron yokes; magnetic circuit; magnetic displacement sensor; magnetorestrictive laminate composites; magnets; piezoelectric laminate composites; sensitivity; Laminates; Magnetic circuits; Magnetic flux; Magnetic materials; Magnetic sensors; Magnetostriction; Sensor phenomena and characterization; Temperature sensors; Thermal sensors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463915

Filename

1463915