Elektrichestvo_i_magnetizm
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(5) (4) , R r ,
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. 2.
d
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(8) (7)
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.3
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hd = 0,2 , id = 90
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id B |
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.4
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1.
. 1.
("0" ).
220 .
2. 0.5; 1,0; 1,5; 2,0 .
, (
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23
3.
Jc (10) (1); 1.
4.R
(11); 1. R
5.1 B J .
2.
z .
I. Jc
.
2.
z = 1 , .
2.
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z, c
C
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B,
(11). Rx,
1. 2.
z.
4.Jc
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1.- - . ,
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2.B L.
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3.,
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4..
24
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p S,
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p = ISn |
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n - ,
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M |
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p B |
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pBsin(p B) , |
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, p B .
BI, p
. , M=0,
B' = B + BI
B . B
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, , :
pl ( ) ps.
, ( .1).
I=e ,
pl = ISn = e r2n,
e - , - , r -
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pl
( .2)
L= mer×V,
me - .
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pl L
pl e L
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Z – .
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pl L
B ( .2).
p ,
B.
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i 1 |
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i 1 |
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k , |
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p p |
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N - . |
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V – ; |
p - |
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J
J = H |
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1. – ( , ), |
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pl |
ps |
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p p ,
B,
=-(10-6 - 10-8).
2. – , B p 0 p 0, J=0
p p .
B
(p p )
, J>0 >0,
= (10-4 - 10-6).
3. – ,
p 0.
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27
,
A C B
H=0 |
H=0 |
a) |
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H?0 |
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, ( .3, ).
p . (10-6 - 10-8) .
A B C ( .3, )
(10-8 - 10-9) .
, .
J
J .
II
I
H
H
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p = p = 0
28
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( .3, ).
J H
.4. J(H)
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I
H. ( II)
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H.
- J(H) - .
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Br |
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Hc |
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A1 |
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.5 |
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H
, ( .5, 1, 2).
(B=0, H=0),
OA.
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A H B |
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(A–Br–Hc–A1). H=0 |
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B=Br. |
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(-Hc), |
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(B=0, H=-Hc), . |
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Hmax H , |
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1. 2 |
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Hmax<H . B H
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, Hc 100
. Hc<100 , .
H ( .6).
/ 0 , H
H .
( ..3, )
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1
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µmax |
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H |
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1 |
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Br, |
B , |
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5000 |
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0,06 |
2,1 |
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0,16 |
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0,79 |
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2000 |
0,9 |
1,6 |
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0,2 |
.7.
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