Crystal defects and spin tunneling in single crystals of Mn12 clusters
J. M. Hernandez, F. Torres, E. Molins, J. Tejada
Abstract
The question addressed in this paper is that of the influence of the density of dislocations on the spin tunneling in Mn12 clusters. We have determined the variation in the mosaicity of the crystal structure of fresh and thermally treated single crystals of Mn12 by analyzing the widening of low angle X-ray diffraction peaks. It has also been well established from both isothermal magnetization and relaxation experiments that there is a broad distribution of tunneling rates which is shifted to higher rates when increases the density of dislocations.
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