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

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4437

Lastpage

4439

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538893

Filename

538893