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Date of Publication:2022-10-04

Journal:大连理工大学学报

Affiliation of Author(s):机械工程学院

Issue:6

Page Number:937-941

ISSN No.:1000-8608

Abstract:Study on the magnetostrictive characteristics of giant magnetostrictive thin film (GMF) with gas sensitive layer is prerequisite to implement its application to micro-gas sensor field. Based on the nonlinear elastic theory and the assumption that the magnetostrictive effect is equivalent to the effect of body force loaded on GMF, a low magnetic field static magnetomechanical coupling model of cantilever double layer GMF with gas sensitive layer is established and mathematics relationship between magnetic field and displacement of cantilever GMF is resolved. The correctness of mathematics relationship between magnetic field and displacement is validated by experiments on TbDyFe/PI/SmFe and TbDyFe/Cu/SmFe of double layer GMF with gas sensitive layer. Experimental results indicate that the deflection curve model has better predictability and the GMF with gas sensitive layer exhibits larger magnetostrictive strains.

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