Fig. (6)
Dependencies of focal distances f
+
and f
–
on value of parameter of exchange interaction α
1
. α
2
= 6×10
-11
cm
2
, β
1
= 10, β
2
= 15, ρ
2
= 2, L
1
= 25×10
5
cm
-1
, L
2
= 30×10
5
cm
-1
, M
01
= 105 G, M
02
= 95 G, ω = 2×10
11
s
-1
, H
0
= 1500 Oe.