[Fe (3.1 nm)/Ni (3.3 nm)]20 multilayer films were prepared by DC magnetron sputtering onto oxidized Si(100) substrates. The Fe and Ni layers were shown to both be face-centered cubic by x-ray diffraction. Interdiffusion of the Fe and Ni layers in the temperature range of 300–430 °C was studied by x-ray reflectivity. From the decay of the integral intensity of the superlattice peak, the activation energy and the pre-exponential term for the effective interdiffusion coefficient were determined as to 1.06 ± 0.07 eV and 5 × 10−10 cm2/s, respectively. The relevance of the measured interdiffusion coefficient to the laboratory timescale synthesis of L10 ordered FeNi as a rare-earth free permanent magnet is discussed.

1.
D.
Weller
,
A.
Moser
,
L.
Folks
,
M. E.
Best
,
W.
Lee
,
M. F.
Toney
,
M.
Schwickert
,
J.-U.
Thiele
, and
M. F.
Doerner
,
IEEE Trans. Magn.
36
,
10
(
2000
).
2.
L.
Néel
,
J.
Pauleve
,
R.
Pauthenet
,
J.
Laugier
, and
D.
Dautreppe
,
J. Appl. Phys.
35
,
873
(
1964
).
3.
J.
Paulevé
,
A.
Chamberod
,
K.
Krebs
, and
A.
Bourret
,
J. Appl. Phys.
39
,
989
(
1968
).
4.
L. H.
Lewis
 et al,
J. Phys.: Condens. Matter
26
,
064213
(
2014
).
5.
K. B.
Reuter
,
D. B.
Williams
, and
J. I.
Goldstein
,
Metall. Trans. A
20
,
719
(
1989
).
6.
R. B.
Scorzelli
,
Hyperfine Interact.
110
,
143
(
1997
).
7.
J.
Paulevé
,
D.
Dautreppe
,
J.
Laugier
, and
L.
Néel
,
J. Phys. Radium
23
,
841
(
1962
).
8.
H. E.
Cook
and
J. E.
Hilliard
,
J. Appl. Phys.
40
,
2191
(
1969
).
9.
H.
Nakajima
,
H.
Fujimori
, and
M.
Koiwa
,
J. Appl. Phys.
63
,
1046
(
1988
).
10.
D. B.
Aubertine
,
N.
Ozguven
,
P. C.
Mclntyre
, and
S.
Brennan
,
J. Appl. Phys.
94
,
1557
(
2003
).
11.
A. L.
Greer
and
F.
Spaepen
,
Synthetic Modulated Structures
, edited by
L. L.
Chang
and
B. C.
Giessen
(
Academic
,
New York
,
1985
), p.
420
.
12.
N.
Zotov
,
J.
Feydt
,
A.
Savan
, and
A.
Ludwig
,
J. Appl. Phys.
100
,
073517
(
2006
).
13.
J. I.
Goldstein
,
R. E.
Hanneman
, and
R. E.
Ogilvie
,
Trans. Metall. Soc. AIME
233
,
812
(
1965
).
14.
V.
Ganesan
,
V.
Seetharaman
, and
V. S.
Raghunathan
,
Mater. Lett.
2
,
257
(
1984
).
15.
B.
Million
,
J.
Růžičková
,
J.
Velíšek
, and
J.
Vřešťál
,
Mater. Sci. Eng., A
50
,
43
(
1981
).
16.
D. W.
James
and
G. M.
Leak
,
Philos. Mag.
12
,
491
(
1965
).
17.
N. W.
de Reca
and
C. A.
Pampillo
,
Scr. Metall.
9
,
1355
(
1975
).
18.
D.
Juvé-Duc
,
D.
Treheux
, and
P.
Guiraldenq
,
Mater. Sci. Eng., A
42
,
281
(
1980
).
19.
A.
Gangulee
and
F. M.
d'Heurle
,
Jpn. J. Appl. Phys., Part 1
13
,
625
(
1974
).
20.
J.
Zhang
,
D. B.
Williams
, and
J. I.
Goldstein
,
Metall. Mater. Trans. A
25
,
1639
(
1994
).
21.
M.
Krčmar
,
C. L.
Fu
,
A.
Janotti
, and
R. C.
Reed
,
Acta Mater.
53
,
2369
(
2005
).
22.
V. R.
Reddy
,
A.
Gupta
,
A.
Gome
,
W.
Leitenberger
, and
U.
Pietsch
,
J. Phys.: Condens. Matter
21
,
186002
(
2009
).
23.
D. C.
Berry
, “Ultrahigh density magnetic recording media: The A1 to L10 phase transformation in FePt and related ternary alloy films” Ph.D. thesis (
Carnegie Mellon University
,
2007
).
24.
Y.
Endo
,
N.
Kikuchi
,
O.
Kitakami
, and
Y.
Shimada
,
J. Appl. Phys.
89
,
7065
(
2001
).
25.
Y.
Endo
,
K.
Oikawa
,
T.
Miyazaki
,
O.
Kitakami
, and
Y.
Shimada
,
J. Appl. Phys.
94
,
7222
(
2003
).
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