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Meir Achuz
Jun3-07, 07:34 AM
Sci Advisor
HW Helper
PF Gold
P: 2,010
That arrangement would tend to preserve the magnetization.
It would be better if they touched. 5 cm seems like too much.
The preserving effect depends on d^2/A(area). If this is not<<1, the effect would tend to fall off as 1/d^2.
The time dependence depends on temperature and the particular characteristics of the magnetic material.