@article{SisLab140, volume = {78}, number = {23}, title = {Large Magnetostrictive Susceptibility in Tb2013 FeCo/FeCo Multilayers}, author = {N.H. Duc and T.M. Danh and N. A. Tuan and J. Teillet}, year = {2001}, pages = {3648--3650}, journal = {Applied Physics Letters}, keywords = {cobalt alloys;coercive force;ferromagnetic materials;heat treatment;iron alloys;magnetic multilayers;magnetostriction;soft magnetic materials;sputtered coatings;terbium alloys;7550Bb;7560Ej;7570Cn;7580+q;8140Gh;8140Rs}, url = {https://eprints.uet.vnu.edu.vn/eprints/id/eprint/140/}, abstract = {Tb(Fe0.55Co0.45)1.5/Fen and Tb(Fe0.55Co0.45)1.5/(Fe0.5Co0.5n multilayers were fabricated by rf-magnetron sputtering from composite targets. Magnetostriction was measured using an optical deflectometer. The as-deposited films showed a soft magnetic and magnetostrictive character, with a coercive field {\ensuremath{\mu}}0Hc=5 mT and a parallel magnetostrictive susceptibility {\ensuremath{\chi}}{\ensuremath{\lambda}}{\ensuremath{|}}{\ensuremath{|}}=d{\ensuremath{\lambda}}{\ensuremath{|}}{\ensuremath{|}}/d({\ensuremath{\mu}}0H)=1.4{$\times$}10-2 T-1. This magnetostrictive softness was strongly improved by heat treatments: the magnetostrictive susceptibility attains the huge value of 5{$\times$}10-2 T-1 in applied field of 6 mT. The low-field dependence of the magnetostrictive susceptibility and their technical characters are described in detail. {\copyright} 2001 American Institute of Physics.} }