5. Slow relaxation and magnetic hysteresis
For a superparamagnet, the mean time between two reversals of magnetization of the particle is equal to :
with :
- τ 0 :
- characteristic spin reversal time (τ0 = 10–12 to 10–6 s),
- K :
- magnetic anisotropy,
- V :
- volume of the magnetic particle,
...
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Slow relaxation and magnetic hysteresis
Slow relaxation and magnetic hysteresis
Key molecules in the development of magnet molecules
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