:
1) .
M = m / V [A/] (5.1)
V ; m
2) H [A/]
:
H = I / 2pr (5.2)
I ; r .
:
H = w1 I / p d (5.3)
w1 ; d .
3) () .
= m0 ( + ) (5.4)
m0 (4p×10-7) /
4) , . . .
k = / (5.5)
5) . , , .
m = 1 + k = / m0 (5.6)
, .
. k 1, . , .
- , . () , , . Al, Pt, Pd, Ca, Mg, Mn, Na, Fe, Ni, Co .
, , , - , . e- . . , . . k < 0. Cu, Au, Ag, Pb, Zn, Hg, Ga . . .
, () . . t , , . Cr, NiF2, FeF2, NiO.
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k 1 ( ).
:
) (k = 103104).
) ( T) , .. 3-4 .
(T=18), (769), (1131), (358).
, () . () ( 5.1).
, , .
, . 10-2 10-5 .
5.1 5.2
:1-
2-
. , , .
, , 5.2. , . ( /) . , .
// , , . . . ( ///) , () . . ( IV) . , . . , .
5.3
a, .
, m=/(m0), a , (. 5.3).
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m (ͮ0) , ~0,1/. mmax.
. 5.1.
, s,. , , , , , .
5.1
Tk, 0 | mmax | s, | |
Fe | 2,15 | ||
Ni | 0,61 | ||
Co | 1,7 |
, =f(H) . ( 5.4). . , . () .
5.4-
Hs, 5 . + c , , c, Bs, r . ( ) ( ). , , . .
, . tgd.
. . . , , :
Pr=hBmn f V (5.7)
h , ; m - ; n=1,62,0 , ; f ; V .
, ; .
, ; . . , . :
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P= 1,6f2h2max2/r (5.8)
f , h , r - , ė .
, . . .
, , , , .
: ( ); ; (); (); .