Microstructure and Coercivity of Granular Nanocomposite FePt–Ag Multilayer Films
Resource
IEEE TRANSACTIONS ON MAGNETICS, VOL. 41, NO. 10, OCTOBER 2005
Journal
IEEE TRANSACTIONS ON MAGNETICS
Journal Volume
VOL. 41
Journal Issue
NO. 10
Pages
-
Date Issued
2005-10
Date
2005-10
Author(s)
Chen, S.C.
Kuo, P.C.
Sun, A.C.
Chou, C.Y.
Fang, Y.H.
Kuo, S.Y.
DOI
246246/200611150121269
Abstract
The face-centered-tetragonal granular L10FePt nanoparticles with large in-plane coercivity (Hc ) of about 3923 Oe can be achieved
by an Ag-capped layer of 5-nm thickness deposited onto the FePt magnetic layer, with thickness of 20 nm, after annealing at 400 C for
30 min. The perpendicular coercivity (Hc ) of the films is increased by increasing the annealing temperature ( ), and the Hc value is
about equal to the Hc value when the annealing temperature is increased to 600 C. TEM-energy disperse spectrum analysis reveals
that the Ag mainly distributed at the grain boundary of FePt and results in the isolation of the FePt grains as well as the increase of the
grain boundary energy, which will enhance coercivity and change the preferred orientation of the FePt film.
Subjects
Ag-capped layer
coercivity
FePt–Ag multilayer films
magnetron sputtering.
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
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