MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Magnetic Properties of L10 Ordered FePt Films Prepared on a Fe–Si–B–Nb–Cu Soft Magnetic Underlayer
Ichiro FujiiToshiyuki ShimaKoki Takanashi
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2006 Volume 47 Issue 1 Pages 47-51

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Abstract

(001)-oriented FePt films with large perpendicular magnetic anisotropy have been obtained on a soft magnetic underlayer (SUL). A nanocrystalline Fe–Si–B–Nb–Cu alloy film has been chosen as SUL, showing the coercivity Hc of less than 80 A/m after annealing at 400°C. It has been found that the crystal orientation and magnetic properties of FePt films are improved by the introduction of a MgO interlayer between FePt and Fe–Si–B–Nb–Cu. The strong (001) texture and the large coercivity of 565 kA/m have been obtained in the tri-layer structure of Fe–Si–B–Nb–Cu (200 nm)/MgO (5 nm)/FePt (10 nm).

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© 2006 The Japan Institute of Metals and Materials
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