The effect of 0.3 to 3at%Fe on the dislocation structure and mechanical characteristics were studied. It was shown that Fe-doped B was p-type. A hole concentration increase, from 6 x 1017 to 2 x 1019/cm3, led to an increase in the absolute value of the dynamic room-temperature shear modulus from 175 to 190GPa. The activation energy for the mobility of twin dislocations decreased from 1.30 to 0.75eV, while that for partial dislocations decreased from 2.1 to 1.8eV. The interaction energy of twin and partial dislocations, with point defects, also varied between 0.45 and 0.11eV. Changes in the structure-sensitive properties of Fe-doped B were attributed to the formation of shallow donor or acceptor levels at defects such as kinks on twin or partial dislocations.

Physico-Mechanical Characteristics of Fe-Doped Boron. M.Antadze, Z.Zoidze, D.Gabunia, O.Tsagareishvili, D.Lezhava, G.Darsavelidze: Journal of Solid State Chemistry, 2000, 154[1], 188-90