Title :
Remanence enhancement due to exchange coupling in multilayers of hard- and softmagnetic phases
Author :
Parhofer, Stefan M. ; Wecker, Joachim ; Kuhrt, Christian ; Gieres, Günter ; Schultz, Ludwig
Author_Institution :
Corp. Res. & Dev., Siemens AG, Erlangen, Germany
fDate :
9/1/1996 12:00:00 AM
Abstract :
Nd-Fe-B/Fe/Nd-Fe-B trilayers with individual layer thicknesses between 10 and 100 nm have been grown by sputter deposition. The aim of our study is to investigate remanence enhancement due to exchange coupling between the soft- and hard-magnetic layers as a function of the Fe-interlayer thickness d. It is shown that for decreasing d the remanence of the trilayer system is significantly increased due to exchange coupling. The coercivity of the trilayer is also increased for d<40 nm which can be explained with a higher nucleation field for magnetization reversal
Keywords :
boron alloys; exchange interactions (electron); iron; iron alloys; magnetic multilayers; magnetisation reversal; neodymium alloys; permanent magnets; remanence; soft magnetic materials; sputtered coatings; Fe-interlayer thickness; Nd-Fe-B/Fe/Nd-Fe-B trilayers; NdFeB-Fe-NdFeB; coercivity; exchange coupling; hard magnetic phases; magnetization reversal; multilayers; nucleation field; remanence enhancement; soft magnetic phases; sputter deposition; Couplings; Grain size; Iron; Magnetic properties; Magnets; Nonhomogeneous media; Polarization; Remanence; Soft magnetic materials; Sputtering;
Journal_Title :
Magnetics, IEEE Transactions on
