ʶҺѹҪѯ
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  Դͧǹ俿Ǵ
ʹ ¹͡ õǹ俿Ǵ öʴ Ҿ Ҿ˹ §ҧ ҹ ʴҾ ù俿Ǵ س ӡҤ سԡĵ ʴҾ س ٧Ҥ سԡĵ ʹ ¹͡ ǹ俿Ǵ Դ ҧǹʴҾ ù俿Ǵ кҧǹʴҾԫ ٻẺ ͧԴdz ʴҾ ù俿Ǵкdzʴ ҾԨö 3 ʶҹФ
- ʶҹлҹҧ (intermediate state)
- ʶҹм (mixedstate)
- ʶҹмǹ俿Ǵ (surface conductivity)

Ҿ ͧ ǹ俿Ǵ 㹺dz դ ʹ 硵ҧ ѹ ŷ ǹ俿Ǵ ҧ͡ 2 Դ
1. ǹ俿ǴԴ 1 ҧ͹ ( Type 1 or Soft superconductor ) ǹ˭繾ǡҵصҧ
2. ǹ俿ǴԴ 2 ҧ (Type 2 or Hard superconductor ) ǹ˭繾ǡûСͺ
ǹ俿Ǵ շ
ʹԡĵ դҵ = ѡʴطդҡ
ʹԡĵ դ٧ = ѡʴطդҡ
ѧ ͧҹ秢ͧʴҨ͡繵ǹ俿ǴẺ͹ еǹ俿ǴẺ
㹻Ѩغѹͧǹ俿Ǵѡ 觵سѵԷҧ 2 ¡
ǹ俿Ǵ1 еǹ俿Ǵ2
(ºѺ ͹ л ӴѺ)

ѡɳСԴç㹵ǹ俿Ǵ 2
ʹ硨ҡ¹͡͹ մѧٻҧҧ
سѵԷҧ俿Ңͧǹ俿Ǵ 2 ¹ŧ ҳͧ ͻ Ըաâٻ Сҿ 硡ٻ hysteresis ͻ Ըաâٻ Ҩ ǹ俿Ǵ 1 繻 2 ǹ俿 ѡ¶֧ 1
ῡ Ӥѭ 㹡á˹ سѵԢͧ ǹ俿Ǵ penetrationdepth ͧʹ (l) coherencelength (x) ῡá ʴ֡ ͧëҺ ͷطǧ ͧʹ ǹ俿Ǵ ǹῡͧ ʴзҧ ͺࢵ 觤سѵ ͧ͹ѡѹ 硵͹ ͺࢵ 鹨¹ŧ ǹ俿Ǵ Сͺ ǹҾ ù俿Ǵ ǹҾ ǹ俿Ҹ Ҿ蹹 ʹ ǹ ǹӸ դ Hc ʹ Hc Һ ǹ ǹ俿Ǵ ¤֡ l Ҿ perfect diamagnetic (m = -Hc) ѧҹ (free energy) բҴ ҡ ó ʹ Һ ֧

( -mom)dH = (moHc2)/2
ѧ dz ᴹ ëҺ ͧʹ зѧҹ բҴ¡ óҺ 繻ҳ l(moHc2)/2) 㹢ǡѹ ֡ x ҡᴹ 繺dz transition ѧ¹ ҡҾ 俿һ Ҿ 俿Ǵ ͧҡѧҹ ͧ硵͹ ʶҹ 俿Ǵ դҹ¡ ʶҹй俿һ 繤 (moHc2)/2) Щй ÷ҹ transition դ֡ x ѧҹ ͧ硵͹ դ٧ x(moHc2)/2) ººѺóҹ transition ѧ鹾ѧҹ㹡ҧǾᴹ˹¾鹷

aN.s @ (x-l).(moHc2)/2)

ҡ ù ҷҺ x > l ѧҹ 㹡ҧ ᴹդ 繺ǡ Щй ᴹ Դ ͵ 俿Ǵ ҡ x < l aN, a դ ź ʴ ҧᴹ ͵ǹ俿Ǵ зѧҹ դŴŧ 蹤 ǹ 繷 ǹ俿һ Ǵ зʴ ʶҹʶҾ
ǹ俿Ǵ 1 ó x > l
ǹ俿Ǵ 2 ó x < l

ʴ ǹ俿Ǵ 1 ͧҡ ѧҹ aN,S դ繺ǡ Һ㴷 Ha ѧդҹ¡ Hc ʴ ǹ 繵ǹӻ ʴب֧ʴҡó B ʴդٹ Ha դ٧ Hc ʴء ǹӻ B =mo Ha
ʴ ǹ俿Ǵ 2 ͧҡ ѧҹ դź ѧ ʴ ֧շ ǹӻ Ǵ Сóչ ó Ha դ٧Թ ˹(Hc1) Hc1 ¡ lower critical field Ha դ٧ Hc1 ѧӡ Hc2 (upper critical field) ʴ ǹ 駷 ǹ俿Ǵ лԼѹ Ha դ ҡ ҵ ͧ ǹ俿һ Ha > Hc2 ʴ С ǹ俿һ ҨҺ ѧ ç ǹ俿Ǵ 2

o = (h)/2e = 2.068 * 10 -15 Wb
· o : magnetic flux quantum 繤 ҧ͹ ҧ˹


ٻ § ٻ ͧ flux-quantum line 觫 ǹ俿Ǵ 2 ١ ʴ flux-quantum line (o) ١ ǧ ʴ 俿 عͺ flux-quantum line (o)
ҹ magnetic flux quantum ٻçк͡ҡѺ coherence length x 繵ǹ俿һժ¡ normal core magnetic flux quantum ٻժ¡ fluxon, fluxoid flux-quantum line ҹ§ٻҧ 3 ѧʴٻ ͧҡ ˹蹢ͧ ç ҡѺ Ťٳͧ ӹǹ flux-quantum line ˹˹¾鹷 o Щй Hc2 ֧դһҳ

o/px mo

ͤ´

Hc2 =o/(2px mo)

ºº

Hc2 = 2 x Hco , x = lL / x

· x ¡ Ginzburg-Landau parameter ¡ GL parameter ҡ x 1/2 з Hc > Hc2 ж O < H < Hc зԴ perfect diamagnetic ʴصǹ俿Ǵ 1 x >1/2з Hc2 > Hc H > Hc зԴҾ俿Ǵ flux-quantum line Һʴصǹ俿Ǵ 2 㹵ǹ俿Ǵ 2 lower critical field Hc1 magnetic flux Һ鹤ӹdz ¡õǹŴͧѧҹԴҡŴŧͧ magnetization դҡѺǹͧѧҹԴҡ flux-quantum line

Hc1 = [(o)/(4pmolL) ] * lnx = [(Hco) /( 2x)] * lnx





     
§ҹ Ԫ ʴʵ   

 

˹ѧ硷͹ԡ

 

 

˹ѧ硷͹ԡԡ 1 ˹ѧͿԡ 1 Ҥʵ
˹ѧͿԡ 1  Ҥ ͧ ͹Ф ˹ѧ硷͹ԡԡ 2

 

  ¹͹ԡ 1  ҹҧԹ

1. Ѵ 2. ǡ
3.  ͹Ẻ˹Ե 4.  ͹躹йҺ
5.  ͹ͧǵѹ 6. ûء졮͹ͧǵѹ
7.  ҹоѧҹ  8.  ô
9.  ع   10.  Ţͧѵ
11. ͹ẺҺ 12. ״
13. ʵͧ   14. ҳ͹  䡡ö͹͹
15. ͷ˹ͧͧ䴹ԡ  16. سѵԧšŢͧ
17.  18. Ф§

  ¹͹ԡ 2  ҹҧԹ  

1. 俿ʶԵ 2.  ʹ俿
3. ҧͧ¿  4.  纻ШСõ͵ǵҹҹ 
5. ѡ俿 6. 俿 
7. ʹ  8.˹ǹ
9. 俿ҡѺ  10. ҹ 
11. ʹ俿ҡ 

12. ʧСͧ

13. ɮѷҾ 14. ʵ͹
15. çҧͧе 16.  

  ¹͹ԡ  ҹҧԹ

1. ʵ ( kinematic)

   2. žʵ (kinetics) 

3. ҹ 4. ԡ §
5.  ͧšѺ͹ 6.俿ʶԵѺ俿 
7. 俿  8.    俿ҡѺʧ
9.  ɮѷҾ е    

 

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