publication . Article . Preprint . 2001

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

Joan Manel Hernàndez; Elies Molins; A. García-Santiago; Javier Tejada; Francesc Torres;
Open Access
  • Published: 25 Oct 2001 Journal: Journal of Magnetism and Magnetic Materials, volume 272-276, pages 1,111-1,112 (issn: 0304-8853, Copyright policy)
  • Publisher: Elsevier BV
Abstract
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.
Subjects
arXiv: Condensed Matter::Materials ScienceCondensed Matter::Strongly Correlated Electrons
free text keywords: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Condensed Matter - Materials Science, Time evolution, Crystal, Magnetization, Dislocation, Scaling, Tunnel effect, Quantum tunnelling, Single crystal, Materials science
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