Title :
High magnetostriction in low applied magnetic fields in amorphous Tb-Fe (hard)/Fe-B (soft) multilayers
Author :
Prados, C. ; Panagiotopoulus, I. ; Hadjipanayis, G.C. ; Freijo, J.J. ; Hernando, A.
Author_Institution :
Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
High magnetostrictive amorphous multilayers consisting of Tb-Fe (hard) and Fe-B (soft) bilayers have been grown by dc sputtering. The layers have been found to be magnetically coupled for layer thicknesses between 25 and 75 Å. As an effect of the coupling, high magnetostriction values (around 5×10-4) are obtained with low coercive fields (around 100 Oe). A qualitative magnetic model has been developed to account for the influence of the size and magnetic parameters on the multilayer magnetostriction and its saturation field, and the observed magnetization processes
Keywords :
amorphous magnetic materials; boron alloys; ferromagnetic materials; iron alloys; magnetic multilayers; magnetisation; magnetostriction; soft magnetic materials; sputtered coatings; terbium alloys; 25 to 75 A; TbFe-FeB; amorphous Tb-Fe/Fe-B multilayers; dc sputtering; hard-soft multilayers; high magnetostriction; high magnetostriction values; low applied magnetic fields; low coercive fields; magnetization processes; multilayer magnetostriction; qualitative magnetic model; saturation field; Amorphous magnetic materials; Amorphous materials; Magnetic field induced strain; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetostriction; Perpendicular magnetic recording; Saturation magnetization; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
