IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Magnetostrictive bimagnetic trilayer ribbons for temperature sensing
Autor/es:
MENDOZA ZÉLIS P.; SÁNCHEZ F.; VÁZQUEZ M.
Revista:
JOURNAL OF APPLIED PHYSICS
Editorial:
American Institute of Physics
Referencias:
Año: 2006
ISSN:
0021-8979
Resumen:
A magnetic biphase trilayer ribbon, consisting of a melt-spun FeSiB inner amorphous ribbon with positive magnetostriction coated by two electroplated nickel layers with negative magnetostriction, is here proposed as an element to be incorporated in temperature sensor devices. The inductance of a small coil wounded around the trilayer is characterized as the sensitive parameter. The dependence of coil’s inductance on thickness of electroplated Ni has been evaluated in the range of measuring temperatures 0 - 70°C, and optimum electroplating parameters were determined. Magnetic characteristics are determined through the study of hysteresis loops, which denote the presence of the two magnetic phases.             The experimental results are interpreted considering a simple magnetoelastic model taking into account the mechanical stresses arising from the different thermal expansion coefficients of each magnetic phase.