CoPt 17
1...1 1.1...1 1.2...1 1.2.1...1 1.2.2...1 1.2.3...2 1.3...3 1.4 CoPt...3 1.5...4 2...6 2.1...6 2.1.1...6 2.1.2...6 2.2...7 2.2.1 X...7 2.2.2...7 2.3...8 2.3.1...8 2.3.2...9 3 CoPt...10 3.1...10 3.1.1...10 3.1.2...10 3.2 ( )...10 3.3 CoPt...11 -i-
3.4...11 4 CoPt...13 4.1...13 4.2 Co:Pt=8:1...13 4.2.1 EPMA...13 4.2.2...13 4.2.3 X...17 4.2.4...18 4.3 Co:Pt=4:1...19 4.3.1...20 4.3.2 T...21 4.3.3 T X...24 4.4...25 5...26...27...28 -ii-
1 1.1 (HDD MD ) ( ) 1.2 1.2.1 0 1 2 0 1 0 1 1.1 1.1 1.2.2 1.2-1-
( ) ( ) ( ) 1.2.3 1) 1.2 (1) (2) (3) / -2-
2) 3) 4) 1.3 (anodized aluminum) 20 (Al 2 O 3 ) ( ) 1.3 ( ) 1.3 1.4 CoPt 5) Co Pt (solid solution) 2 ( ) (substitutional solid solution) (interstitial solid solution) CoPt Co -3-
(hcp:hexagonal close packed) (fcc:face centered cubic) Pt fcc CoPt 1.4 CoPt Co:Pt 4:1 CoPt 3 700 Cu 3 Au 1.5(a) fcc Co Pt Co:Pt 1:1 CoPt 825 CuAuI (fct:face centered tetragonal) 1.5(b) Co Pt fct (001) c/a 0.97 1 fcc CoPt fct CoPt c 1.4 CoPt (a)copt 3 Cu 3 Au (b)copt CuAuI 1.5 CoPt 1.5 1.3-4-
Co Fe Ni Co Fe 1.4 Co Pt 1:1 CoPt CoPt CoPt 825 660 600 60 CoPt CoPt -5-
2 2.1 (VSM:Vibrating Sample Magnetometer) 2.1.1 2.1 M x z a A(x,y,z) x-y S N E =2 f E = KafM j t + exp ω π (2.1) 2 K NSx K = 3 (2.2) 5 2r r N S (2.1) a f M E M 2.1.2 2.1 VSM ( ) VSM-5 (1) z (2) a -6-
(3) E 80Hz 10kOe 2.2 X 2.2.1 X 6) 7) X 2.2 X X Bragg X X X X (Cu) CuK 2.2 X 2.2.2 X 2.2 Bragg λ = 2dsinθ (2.3) d a,b,c, (h k l) a=b=c 1 2 2 2 h + k + l 2 = 2 (2.4) d a (2.3) (2.4) 2 2 2 2 λ + + 2θ = 2sin -1 h k l 2 2 (2.5) a a=b 1 2 2 2 h + k l 2 = 2 + 2 (2.6) d a c -7-
(2.3) (2.5) 2 2 2 2 1 λ + h k l 2θ = 2sin 2 2 + 2 (2.7) a c a=b 1 4 2 2 2 h + hk + k l 2 = 3 2 + 2 (2.8) d a c (2.3) (2.8) 2 2 2 2 2 1 λ 4 + + 2θ = 2sin - h k l 2 3 2 2 + l (2.9) a c X CuK (40kV 40mA) λ = 1. 5406 ( ) (2.10) (2.5) (2.7) (2.9) (2.10) 2 2.1 2.1 2.3 (EPMA:Electron Probe(X-ray) Micro Analyzer) CoPt 2.3.1 EPMA 2.3-8-
( ) X ( ) X X ( ) ( ) 2.3.2 8) 2.3 CoPt 660 600 ( ) 1.4 1.4 Co:Pt=1:1 600-9-
3 CoPt 3.1 3.1.1 99.999 0.3mm (Al) 15mm 25mm 3.1.2 3.1 0.2mol/l (C 2 O 4 H 2 ) (C) 10mA/cm 2 60 3.1 3.2 ( ) 3.1 0.1mol/l (H 3 PO 4 ) 5V -10-
3.3 CoPt 3.2 CoPt Co:Pt=8:1,4:1 (Pt) ( 3.3 ) 10V ON (T on ) 30ms T(T no T off ) 150ms 450ms 100 1000 10mm 10mm 3.2 3.3 3.4 9) CoPt Co Pt 1:1 (fct ) c -11-
CoPt 600 60-12-
4 CoPt 4.1 Co Pt 50:50 fcc CoPt fct CoPt CoPt 50:50 Co Pt 4:1 8:1 CoPt 4.2 Co:Pt=8:1 Co:Pt=8:1 CoPt T on =30ms T=230ms N=100 1000 4.2.1 EPMA CoPt 4.1 Co 50% 4.1 Co (8:1) 4.2.2 4.2(a) (i) -13-
(a) 100 (b) 200 (c) 300 (d) 400 (e) 500 (f) 600-14-
(g) 700 (h) 800 (i) 1000 4.2 m s H c 4.3 4.4-15-
4.3 m s 4.3 600 4.4 H c 4.4 300 700 0.2 0.5kOe 700-16-
4.2.3 X X 4.5(a) (i) (a) 100 (b) 200 (c) 300 (d) 400 (e) 500 (f) 600-17-
(g) 700 (h) 800 (i) 1000 4.5 X 4.5 2 =21.6(deg) Al 2 O 3 (113) 400 2 =39.8(deg) Pt(111) 2 =44.7(deg) Al{200} Co CoPt 4.2.4 EPMA Co:Pt=1:1 T on =30ms T=230ms N=600 4.6-18-
4.6 (8:1) 4.6 600 600 Co:Pt=1:1 Co 4.3 Co:Pt=4:1 4.2 EPMA Co:Pt=1:1 600 Co EPMA Pt Co:Pt=4:1 T on =30ms T=150ms N=100 1000 EPMA 4.7-19-
4.3.1 4.7 Co (4:1) EPMA Co 12.5 Co:Pt=4:1 T on =30ms T=150ms N=600 4.8 4.8 (4:1,T=150ms) 4.8 4.6 600 600 Co -20-
T Pt T T on =30ms T=300 500ms N=600 4.9(a) (d) (a) T=300ms (b) T=400ms (c) T=450ms (d) T=500ms 4.9 T 4.9 T=300,400ms 600 600 Co T=450,500ms CoPt 4.3.2 T 4.3.1 4.10(a) (e) T on =30ms T=300 500ms N=600-21-
(a) T=150ms (b) T=300ms (c) T=400ms (d) T=450ms (e) T=500ms 4.10 T T m s H c 4.11 4.12-22-
4.11 T m s 4.11 T T=400ms T=150ms 4.12 T H c 4.12 T T=150ms 0.2 0.5kOe -23-
4.3.3 T X 4.3.1 X 4.13(a) (e) T on =30ms T=300 500ms N=600 (a) T=150ms (b) T=300ms (c) T=400ms (d) T=450ms (e) T=500ms 4.13 T X 4.13 2 =21.6(deg) Al 2 O 3 (113) 2 =39.8(deg) Pt(111) 2 =44.7(deg) Al{200} -24-
2 =46.2(deg) Pt{200} Co CoPt 4.4 4.2 N=500 N=300 500 N=300 500 4.3 T T off CoPt Co:Pt=8:1 Co Co:Pt=4:1 Co Pt 1:1 Co -25-
5 ( ) Fe Co 2kOe CoPt EPMA EPMA EPMA Co:Pt=8:1,4:1 600 Co CoPt 600 60 0.2 0.5kOe Co:Pt 1:1 CoPt CoPt CoPt -26-
-27-
1) 1998 p56 p59 2) 1998 p74 p75 3) 1996 4) p17 5) 1993 p45,46,516 6) X 1995 7) 1993 p37 p39 8) 1997 p80,81 9) ( ) -28-