Experimental evidence of the dependence of spin tunnelling on the concentration of dislocations in Mn12 crystals

Details Experimental evidence of the dependence of spin tunnelling on the concentration of dislocations in Mn12 crystals Experimental evidence of the dependence of spin tunnelling on the concentration of dislocations in Mn12 crystals

2001-10-25

arxiv.org/abs/cond-mat/0110538v1

Physics

Condensed Matter

Materials Science

7 pages, 2 figures

Scientific paper

We present experimental results on resonant spin tunnelling in a single crystal of Mn$_{12}$-2Cl benzoate with different concentration of dislocations. The time evolution of the magnetisation follows the stretched exponential over a few time decades. The values of parameters of stretched exponential deduced from experiment have been used to determine the concentration of dislocations before and after the cooling-annealing process, using the algorithm recently suggested by Garanin and Chudnovsky.

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