FePt
26
ii
1-1
1
1-2
FePt
Ku =
2
360
KuV
[1] Ku
V
T [K]
kbT / 2
kb
KuV
kbT
[1]
Ku
2 nm
(b)
(a)
1-2 (a) L10-FePt
(b) A1-FePt
3
1-3
sp2
1985
1991
[12]
1-3
1-4
C76 C78
4
C82 C84
1.03 nm
1-4
[11]
[11]
La
Y
1-5
[11]
Co
1-6
[11]
CaC2 SrC2
[11]
FePt
FePt
5
Ca Sr
Fe Ni
(
)
1-5
Fe
1-6
Fe
1-4
Smalley
[11]
[11]
1.7
6
(
)
(ionization)
[13]
1-7
7
1-8
8
9
10
M.B.P
R.P
2-1
FePt
(4mm
2-2
11
4mm
1mm)
2-1
10-2 Torr
3
100 A
4
He
N2
Ar
Ne
500 Torr
H
Ni
15kOe
H
M
VSM
50
50
15kOe
700
12
2-3 VSM
2-2-2
JEOL JEM-1011M
13
。
2-4 TEM
TEM
TEM
2-5
2-5
14
15
2-6 X
2-7 X
X
(RIGAKU
X
ATX-G)
CuK
= 1.5406
16
(2-6)
L10-FePt
A1
FePt
A1
F = fFePt[1+exp{πi(h+k)}+exp{πi(k+l)}+exp{πi(l+h)}]
(2-7)
f
F = fFe[1+exp{
i(h+k)}]+ f Pt[exp{
i(k+l)}+exp{
17
i(l+h)}]
(2-8)
2-2-3-3
[19]
Bragg
X
1
[19]
Bragg
18
2.10
90
-
d
m
X
1
2dsin
1
m
2(
2dsin
(
1
2
3
4dsin
)dsin
Bragg
=n (n
)
1/2)
1
2
1/4
1
( /2+1)
2
((
+1)/2+1)
m
m
19
d
90
=
t
X
X
X
2dsin
m+1
90
A,D,E,
M
Bragg
B
X
Bragg
C
B
B
90
B
B
m
(m+1)
20
L
-
1
21
22
3-1
3-1
3- 1
3-2
3-3
3-4
A1-FePt
L10-FePt
He N2
Ar Ne
FePt
He
0.26kOe N2
0.81kOe
[16]
1kOe
Fe
3-1
3-1 He
23
Pt
3-2 N2
3-3 Ar
24
3-4 Ne
3-5
He Ar Ne
400
200
15kOe
3-5
25
Fitting
(a)
(b)
(c)
3-6
(d)
Fitting
(c)Ar
(d)Ne
26
(a)He (b)N2
3-2
Fitting
3-2
3-7
15kOe
15kOe
1kOe
15kOe
1 kOe
0.02
emu/g
450
477
L10-FePt
3-8
3-9
He
Fe
[15]
400
500
Fe
27
-Fe
-Fe
[15]
(a) He
(b) N2
(c) Ar
(d) Ne
3-7
3-8
He
28
3-9 Fe
[15]
L10-FePt
Fe Fe3Pt
770
157
477
L10-FePt
A1-FePt
257
0
M
Mj
0(K)
[emu]
Tcj
[K]
Mj
Mj
Mj
3-10
3-3
He N2
L10-FePt
Ar
-Fe
A1-FePt
L10-FePt
29
(b)
(a)
(c)
(d)
3-10
Fitting
(a)He (b)N2 (c)Ar
3-3
(d)Ne
[%]
30
3-3
TEM
3-11
N2
3-11 TEM
(a)He (b)N2
31
(c)Ar
(d)Ne
3-12
He
5.6 nm N2
8.8 nm Ar
3.4 nm Ne
3.6nm
N2
TEM
FePt
(b)
(a)
(c)
3-12
3-4
(d)
(a)He (b)N2
(c)Ar (d)Ne
X
X
He N2
3-13
FePt
(110)
-Fe
32
3-14
3-15
(201)
(110)
3-16
(220)
Ar
(201)
(220)
Ne
FePt
(110)
3-13 He
X
3-14 N2
X
33
3-15 Ar
X
3-16 Ne
X
X
38
34
46
a
b
(
c
d
)
3-17
-Fe
(110)
44.64
44.3
3-4
3-5
Fe
Pt
3-6
He N2
3-17
FePt
Fitting
X
(a)He (b) N2 (c)Ar (d)Ne
35
3-4 X
Fitting
3-5 X
3-6
Fe
36
Pt
3-7
X
L10-FePt
L10-FePt
L10-FePt
L10-FePt
L10-FePt
L10-FePt
Fe-Pt
L10-FePt
Pt
L10-FePt
Fe
Ar
Fe
35
55 at.%
Pt
Ne
He N2
Pt
3-7
FePt
3-8
TEM
Ar
He
Ar
FePt
TEM
37
7
10 nm
FePt
3-8
He N2
FePt
3-9
N2
He
FePt
Pt
Fe
3827
3-18
Fe
Pt
2887
FePt
1000
Fe
(
He 24.58 eV N2 15.57 eV Ar
15.76 eV Ne 21.56 eV [20])
(
N2 : 24.3 eV (
38
) [20])
3-9
Pt
Fe
3-18
39
40
41
42
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