Landau-Zener tunneling with many-body quantum effects in crystals of molecular magnets
Abstract
We present a quantum interpretation of the heights in hysteresis of Fe8 molecule at lower temperatures by treating the crystal as an Ising spin system with the dipolar interaction between spins. Then we apply it to two limit cases : rapid and adiabatic regions. Our theoretical analysis is in agreement with the experimental observation in these regions, which indicates that the steps in hysteresis loops of magnetization of Fe8 at lower temperatures show a pure quantum process.
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