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Butterfly Hysteresis Loop and Dissipative Spin Reversal in theS=1/2,V15Molecular Complex
2000
Physical Review Letters
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Time resolved magnetization measurements have been performed on a spin 1/2 molecular complex, so called V_15. Despite the absence of a barrier, magnetic hysteresis is observed over a timescale of several seconds. A detailed analysis in terms of a dissipative two level model is given, in which fluctuations and splittings are of same energy. Spin-phonon coupling leads to long relaxation times and to a particular "butterfly" hysteresis loop.
doi:10.1103/physrevlett.84.3454
pmid:11019113
fatcat:ve7wm2ttsfce5cntdtf7npyb4e