Landau-Zener tunneling with many-body quantum effects in crystals of molecular magnets

Details Landau-Zener tunneling with many-body quantum effects in crystals of molecular magnets Landau-Zener tunneling with many-body quantum effects in crystals of molecular magnets

2004-03-16

arxiv.org/abs/cond-mat/0403395v1

Phys. Lett. A. 323, 460 (2004)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1016/j.physleta.2004.02.015

We present a quantum interpretation of the heights in hysteresis of $Fe_{8}$ 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 Fe$_{8}$ at lower temperatures show a pure quantum process.

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