ʶҺѹҪѯ
ѹ


 
 
 

  ɮըҤ
Ҿù俿 繾ĵԡ ͧͧ 㹡͹ ͧ硵͹ ѺҾ ù俿Ǵ ǡѹ ͨ ĵԡ ͧ硵͹ 仡 硵͹ ö ͹ ҹ Ȩҡ մҧ ءԴ 㹡͸Ժ ĵԡ ͧ硵͹ дѺҤ ҧ俿 (eletromagnetism) Сҧ س˾ʵ 繾鹰ҹ ɮըҤ ˹觷͸Ժ Ҿ ù俿Ǵ դ ɮբͧ ͹͹ (London theory)

ɮբͧ ͹͹ (Londontheory)
..1934 ͧͧС͹͹ (F. London and H.london) 駷ɮ Ѻ ͸ԺҾ ù俿Ǵ ¾Ԩó ͹ͧ 硵͹ 㹵ǹ 俿Ǵ ʹ俿 E 觨 ͧ͹

m(dv/dt) = - eE ......(1)

m ᷹ Ţͧ硵͹

e ᷹ Ш俿Ңͧ硵͹

v ᷹ Ǣͧ硵͹

t ᷹




˹ ͧ俿 (current density) Դҡ ͹ ͧ硵͹

J= nev ......(2)

J ᷹ ˹蹢ͧ俿

n ᷹ ˹蹢ͧ 硵͹

Կù͵ (2) ºѺ t ᷹ v (1)

dJ/dt = (ne2/m)E ......(3)




ʹ Դҡ ͹ ͧ硵͹ ʹ俿 ö ҡ ͧ (Maxwell's equation)

µo (dH/dt) = - XE.......(4)



XH = J + (dD/dt) ..........(5)



. H = 0 ........(6)


dD/dt ᷹ ʡâѴ (displacement current) Ѻ ǹ俿Ǵ ҡ âѴ դҹ¡ Ҥ˹ 俿 ҡ ѧ ֧¹

* H = J .........(7)

᷹ E (3) (4)

dH/dt = - (m/µone2) *(dJ/dt)....... (8)

᷹ J Թô

dH/dt = -(m /µone2) ** (dH/dt) ........(9)

Թõ(9)

H = - (m/µo.ne2)**H ........(10)

ҡҧǡ (vector analysis)

** H= (*H)+2H .......(11)

᷹ŧ(7)

H= (m/µone2) )2H) ........(12)

㹡óբͧ 1 Ե(8) ¹

H = (m/µone2)(d2H/dx2) .........(13)

ӵͺʹͧѺ (13) ¹

H = Ho exp (-x/l) .........(14)

¡ ͹͹ (Londonequation) 觨 Ҥ ʹ 㹵ǹ 俿Ǵ Ŵŧ Ẻ๹ ֡ ҡ l ҡ ¡Ҥ ֡ ͧ͹͹ (London penetration depth) зҧ· ʹ ö ǹ俿Ǵ Ѻ ǹ俿Ǵ դ y ¡Ҥ ˹Ҥʹ ǹ俿Ǵ 鹡 ٹ 觨зԴ ԷԾ Ѻ ǹ俿Ǵ դ y ҡҤ ͧ ʹ 㹵 俿Ǵ 鹡 ٹ 觨зԴ Ҿ Դ Է Ҥ֡ ͧ ǹ俿Ǵ ͧ ЪԴ դ褧 ¹ س س Ҥ֡ դҤ͹ҧ ¡ Ҥ֡੾ (characteristic penetration depth,yo) ¨ ੾ ͧǹ俿 Ǵ ЪԴ зس ҳ 0.8 Ңͧ سԡĵ Ҥ֡ ҧǴ ¨ ͹ѹ سԡĵ ÷ʹͧ Ѻüѹ Ҥ֡ س ¹


l = l0[1-(T/Tc)4]-1/2 .........(15)

T ᷹ سԢͧǹ俿Ǵ

ҧҤ֡੾ТͧкҧԴس 0 K


Metal
In
Al Pb
o (cm) 6.4 * 10 5.0 * 10 3.6 * 10





     
§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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