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1...1 1-1...1 1-1-1...1 1-1-2...3 1-1-3...4 1-1-4...5 1-2...5 1-2-1...5 1-2-2...6 1-3...6 1-3-1...6 1-3-2...7 1-3-3...8 1-3-4...8 1.4 Co-Pt...9 1.5...9 2...10 2-1...10 2-1-1...10 2-1-2...10 2-2...11 2-2-1...11 2-2-2 X...11

2-3...13 3 Co-Pt...14 3-1...14 3-1-1...14 3-1-2...14 3-1-3...14 3-2 Co-Pt...15 4 Co/Pt...16 4-1 Co...16 4-1-1...16 4-1-2...16 4-2 Pt Co...15 4-2-1...17 4-3 C0 Pt Co...20 4-3-1 m S...20 4-3-2 Hc...20 4-3-3 S...21 4-4 Co/Pt...21 4-4-1...21 4-4-2...21 5 Co-Pt...24 5-1 Co-Pt...24

5-1-1...24 5-2...24 5-3...24 5-4 Co-Pt...29 5-4-1 m S...29 5-4-2 Hc...30 5-5...31 5-5-1...31 5-5-2...31 5-5-3...35 6...38...40...41

1 1-1 1-1-1 1) 1-1 0 1 Hc 1-1 1

1 0 2 1-2(a) 1-2(b) 0 1 1-2 (a) (b) 2

1-1-2 2) HDD GMR -3) 1-3 GMR 4 1-4 GMR 3

1-1-3 1-5 1-6 4

1-1-4 1-2 1-2-1 3) ( ) 2Al 3H 2 O Al 2 O 3 6H 6e - (1-1) (ph5 7) ( ) 1-5 ( ) ( ) 1-5 Keller ( ) 1-7 Keller 5

1-2-2 ( ) ( ) nm nm m m 1-7 ( ) Fe Co ( ) 4) Al 2 O 3 1-3 1-3-1 5) 2 (1) (2) (C) 1 (A) 1 (s) 1 1 Ag0.001118g 1g 1 (F) 1F=96500 1 26.8 (Ah) I t m 1-2 m = I t e ( g) = k I t( g) (1-2) 26. 8 e 1g k 1 (Ah) 6

1-3-2 5) (1-3) RT a 0 n+ M E = E + ln (1-3) nf am E 0 R =8.31J K mol T F n a M n+ a M 1 0 E=E 0 E 0 0 1-2 1-2 25 7

1-3-3 5) 2 2 A B 1-8 A B - A B - V 1 A V B V 3 A i A A i B A B 1-8 A B - 1-3-4 6) ph (1) ph (2) (3) 8

1-4 Co-Pt Co Pt A B B A Co-Pt 7) Co (hexagonal close-packed hcp) Pt (face centered cubic fcc) Co-Pt 1-7 Co-Pt 8) Co 80%at. (hcp ) fcc 825 (facecentered tetragonal fct) AuCu (L1 0) A B (001) c/a 0.97 1 9) fccco 50 Pt 50 fct CoPt c 10) 1-5 Fe Co Ni Fe Co 1-4 Co Pt 1 1 Co-Pt ( 1-9) CoPt Co Pt Co CoPt Co Pt 1 1 Co Pt Co-Pt 600 1 1-9 9

2 (V.S.M) X EPMA 2-1 2-1-1 (Vibrating Sample Magnetometer V.S.M) 2-1 M x z a A(x y z) S N x-y E =2 f E = KafM j t + exp ω π (2-1) 2 K NSx K = 3 (2-2) 2r 3 N S (2-1) a f M E M 2-1 V.S.M 2-1-2 (1) z (2) (3) 80Hz 10kOe 10

2-2 2-2-1 X X 2-2 X X X Bragg 2-2 X 2-2-2 X d a (h k l) 1 2 d = h + k + l 2 a 2 2 2 (2-3) X 2-2 Bragg λ = 2d sinθ (2-4) 2 (2-3) (2-4) 2θ = 2sin 1 λ 2 h + k + l 2 a 2 2 2 (2-5) 1 4 h + k + l = 2 2 d 3 a 2 2 2 l + c 2 2 (2-6) 11

2 2θ = 2sin 1 λ 2 4 h + k + l 2 3 a 2 2 2 + l c 2 2 (2-7) X Cu-K (40kV 40mA) =1.5406 (2-8) 2 2-2 (2-5) (2-7) Co a 2.502 c 4.061 9) Co a 3.537 9) Co-Pt a 3.854 9) CoPt :a 2.682 c 3.675 9) Pt a 3.923 9) 2-1 2-1 9) X Co hkl a [ ] c [ ] 10.0 hcp 2.502 4.061 00.2 2 [deg.] 41.6 44.5 Co fcc 3.537 111 200 44.2 51.5 CoPt3 fcc 3.854 111 200 40.5 47.1 CoPt fct 2.682 3.675 101 110 41.7 47.9 Pt fcc 3.890 111 200 40.1 46.7 12

2-3 (Electron Probe Micro Analyzer) EPMA 2-3 X X X 2-3 13

3 Co-Pt 3-1 3-1-1 99.999% 0.2 0.3mm 25 15mm 15 15mm 3-1-2 3-1 0.24mol/l 30 50V 20 3-1 3-1-3 1-5 30 0.1mol/l 40V 2V 8 2V 2 14

3-2 Co-Pt Co-Pt Co Pt 3-2 Pt 30 3-2 3-3 Pt Co-Pt off-time 15mm 15mm 10mm 10mm 3-1 3-3 15

4 Co/Pt 4-1 Co 4-1-1 Co 0.4mol/l Co Co 2 ph on-time 10ms T 150ms N 400 V 8V 12V 4-1-2 H 4-1 4-1(a) (c) 4-2(a) (c) 4-1 ( ) 4-2 ( ) m s Hc 1kOe ph Co Co Co 16

X 4-3 4-3(a) (c) 4-4(a) (c) 2 =38.5 Al(111) Co 2 =41.6 Co(10.0) 2 =44.2 Co(00.2) Co Co Co 4-3 X 4-4 X 4-2 Pt Co 4-2-1 5g/l Pt Pt Co Co Pt on-time 10ms T 150ms N 400 8V 9V Co Pt Co 4-2-2 Pt Co on-time 10ms T 150ms N 400 V 8V 15V 4-5 Pt 8V 4-6 Pt 9V Pt Co Co 17

Pt Pt m s Pt Pt 8V 9V Pt Pt Co Co 4-5 (Pt 8V) 4-6 (Pt 9V) X 4-7 4-8 4-7 Pt 8V 4-8 Pt 9V Pt Pt Pt Pt(111) Co Co 2 =41.7 Co(10.0) Co(10.0) Co 18

4-7 X (Pt 8V) 4-8 X (Pt 9V) 19

4-3 Co Pt Co 4-3-1 m s Co Pt 8V 9V 2 Co 4-9 Co Pt 8V Co Pt 9V Co 11V Pt 12V Co Co 4-9 4-3-2 Hc Co Pt 8V 9V 2 Co 4-10 Co Pt 8V Co Pt 9V Co Pt Pt Co(hcp) 10V Co Pt Pt 4-10 20

4-3-3 S Co Pt 8V 9V 2 Co 4-11 Co Pt 8V Co Pt 9V Co Co 0.5 Pt Pt 8V 0.6 Pt 9V 0.7 Co 1.6 4-11 4-4 Co/Pt 4-4-1 5g/ Pt Pt Co Co Co Pt CoPt 4-4-2 3 10-6 Torr 600 1 4-12(a) (d) 4-12(a) (b) Pt 8V 4-12(c) (d) Pt 9V 21

4-12 (a) (b) Pt 8V (c) (d) Pt 9V Co Co Co X 4-13(a) (c) 4-13(a) (b) Pt 8V 4-13(c) (d) Pt 9V X X Pt(111) 4-13 (b) (d) 2 =41 CoPt(111) Co/Pt CoPt 22

4-13 X (a) (b) Pt 8V (c) (d) Pt 9V 23

5 Co-Pt 5-1 Co-Pt 5-1-1 Co Pt 50 50 Co-Pt (fct )CoPt Co Pt 50 50 Co-Pt Co Pt 4 1 5 1 Co-Pt N 400 Co Pt=5 1 on-time/ T 50ms/300ms 40ms/300ms 30ms/300ms Co Pt=4 1 on-time/ T 30ms/300ms 30ms/150ms 20ms/150ms V 8V 12V 5-2 Co Pt 4 1 5 1 Co-Pt 5-1 4 1 Co 5 1 Co Co Pt 4 1 Co 40% Co Pt 5 1 Co 50% 5-1 Co-Pt 5-3 N 400 Co Pt=5 1 on-time/ T 50ms/300ms 40ms/300ms 30ms/300ms Co Pt=4 1 on-time/ T 30ms/300ms 30ms/150ms 20ms/150ms V 8V 12V Co-Pt 5-2(a) (f) 5-3(a) (f) 5-2 Co Pt=4 1 5-3 Co Pt=5 1 24

5-2 (Co Pt=4 1) 25

5-3 (Co Pt=5 1) 26

Co-Pt Hc 1kOe X 5-4(a) (f) 5-5(a) (f) 5-4 Co Pt=4 1 5-5 Co Pt=5 1 5-4 X (Co Pt=4 1) 27

5-5 X (Co Pt=5 1) 28

5-4 Co-Pt 5-4-1 m s 5-6 Co Pt 4 1 Co-Pt on-time/ T=30ms/300ms Co-Pt on-time/ T=30ms/150ms Co-Pt on-time/ T=20ms/150ms Co-Pt 5-6 Co Pt 4 1 on-time/ T=30ms/300ms on-time/ T=30ms/150ms Co-Pt on-time/ T=20ms/150ms Co-Pt 9V Co-Pt on-time/ T 5-6 (Co Pt=4 1) 29

5-7 Co Pt 5 1 Co-Pt on-time/ T=30ms/300ms CoPt on-time/ T=40ms/300ms CoPt on-time/ T=50ms/300ms CoPt Co Pt 4 1 Co-Pt 5-7 (Co Pt=5 1) 5-4-2 Hc 5-8 Co Pt 4 1 Co-Pt on-time/ T=30ms/300ms CoPt on-time/ T=30ms/150ms CoPt on-time/ T=20ms/150ms CoPt 1kOe 5-8 (Co Pt=4 1) 30

5-9 Co Pt 5 1 Co-Pt on-time/ T=30ms/300ms Co-Pt on-time/ T=40ms/300ms Co-Pt on-time/ T=50ms/300ms Co-Pt Co Pt 5 1 4 1 on-time 1.0kOe 5-9 (Co Pt=5 1) 5-5 5-5-1 Co-Pt 3 10-6 Torr 600 1 5-5-2 N 400 Co Pt=5 1 on-time/ T 50ms/300ms 40ms/300ms 30ms/300ms Co Pt=4 1 on-time/ T 30ms/300ms 30ms/150ms 20ms/150ms V 8V 12V 5-10(a) (f) 5-11(a) (f) Co Pt 4 1 10V 5-10(b) 12V on-time/ T=30ms/300ms Co Pt 5 1 31

5-10 ( N 400) (Co Pt=4 1) 32

5-11 ( N 400) (Co Pt=5 1) 33

Co Pt 4 1 Co-Pt 5-12 5-12(a) on-time/ T=30ms/300ms 5-12(b) on-time/ T=30ms/150ms 5-12(c) on-time/ T=20ms/150ms Co 1.2kOe 4 5-12(a) 12V Co-Pt 5-12 (Co Pt=4 1) 34

Co Pt 5 1 Co-Pt 5-13 5-13(a) on-time/ T=40ms/300ms 5-13(b) on-time/ T=50ms/300ms Co 1.2kOe 4 5-13 (Co Pt=5 1) 5-5-3 X 5-14(a) (f) 5-15(a)Co Pt (f) 5-14 Co Pt 4 1 5-13 5 1 Co Pt 4 1 12V on-time/ T=30ms/300ms Co-Pt 2 =41.7 fct Co-Pt(101) fct CoPt 2 =40.5 Co-Pt Co-Pt(111) Co Pt 5 1 Co-Pt(111) fct Co-Pt(101) fct Co-Pt 35

5-14 X (Co Pt=4 1) 36

5-15 X (Co Pt=5 1) 37

6 ( ) 2kOe CoPt CoPt Co-Pt 825 600 1 Co Pt Co 99.999% 0.2 0.3mm 30 0.24mol/l 50V 20 30 0.1mol/l 2V 0.675mA/cm 2 2V 10 Co Co-Pt Pt Co-Pt Co Pt=4 1 Co Pt=5 1 2 Co 0.4M Pt 5g/l Co/Pt Pt Co Pt N 400 on-time 10ms T 150ms 8V 9V Co N 400 on-time 10ms T 150ms 8V 15V Co Pt Co Pt Pt Co(hcp) Pt Co-Pt Co Pt 4 1 Co-Pt Co 40% Co Pt 5 1 Co-Pt Co 50% N 400 7 13V on-time 20ms 50ms T 150ms 300ms on-time Co-Pt 1kOe Co 38

Co-Pt 3 10-6 Torr 600 1 Co Pt=4 1 12V ontime/ T=30ms/300ms 0.9kOe 1.8kOe X CoPt(111) fct CoPt 1 1 Co Pt 50 50 Co-Pt 39

1) 1998 pp.896-897 2) 1997 p.44 3) 1999 4) 21 pp.816-821 1986 5) 2001 p.10-11 p.16-17 6) 1971 p.19 7) 3 1971 p.471 8) R. M. Bozorth Ferromagnetism IEEE PRESS 1993 p.413 9) 1993 pp.37-39 10) O. Kitakami N. Kikuchi S. Okamoto Y. Shimada K. Oikawa Y. Otani K. Fukamichi J Magn Magn Mater. 202 pp.305-310 1999 40

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