Feuille d`exercices : Ferromagnétisme

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µ0Msat BrHc
−1µΩ
3
5
6
5 7
8
µrN
i α
R
R a R

iR
a
α
~
H1~ H2
~
B1
k~ B1kN= 800 i= 5,0µr= 5,0.103α=
5,0◦R= 10
z
i0B0
i0B0= 0,2

z
l
S Be= 1,6
ε= 8 s= 2 2
l S

ε
s
S
l
BrHc
−1BpHp −1
BaBf
S Be
k=S
s
Ha
HfHel ε L
L
µrε
BaHak l ε µ0
BaHa
VaVe
B2
e
BeVe|HaBa|

|Ha| |Ba| |HaBa|
l
S
S R
µ e
R
N
I
B2
2µB µ
L= 2πR
Φ
Hf
L
µr= 1000 e
L= 0,1